Home / 12,422.12-17,148.20-8,340.75

Finding the Fourth Proportional to 12,422.12, 17,148.20 and 8,340.75

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Solution

The fourth proportional to 12,422.12, 17,148.20 and 8,340.75 is: 11,514.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,422.12 : 17,148.20 = 8,340.75 : x
  2. Step 2: Convert to fraction form
    12,422.12/17,148.20 = 8,340.75/x
  3. Step 3: Cross multiply
    12,422.12x = 17,148.20 × 8,340.75
  4. Step 4: Simplify right side
    12,422.12x = 143,028,807.45
  5. Step 5: Solve for x
    x = 143,028,807.45/12,422.12
  6. Step 6: Final answer
    x = 11,514.05

Related Problems

Find fourth proportional to 6,211.06, 8,574.10 and 4,170.38
Half scale
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Double scale
Find fourth proportional to 12,423.12, 17,149.58 and 8,341.75
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.