Home / 12,367.80-17,077.50-8,122.20

Finding the Fourth Proportional to 12,367.80, 17,077.50 and 8,122.20

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Solution

The fourth proportional to 12,367.80, 17,077.50 and 8,122.20 is: 11,215.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,367.80 : 17,077.50 = 8,122.20 : x
  2. Step 2: Convert to fraction form
    12,367.80/17,077.50 = 8,122.20/x
  3. Step 3: Cross multiply
    12,367.80x = 17,077.50 × 8,122.20
  4. Step 4: Simplify right side
    12,367.80x = 138,706,870.50
  5. Step 5: Solve for x
    x = 138,706,870.50/12,367.80
  6. Step 6: Final answer
    x = 11,215.16

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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.