Home / 9,519.45-13,122.87-6,678.21

Finding the Fourth Proportional to 9,519.45, 13,122.87 and 6,678.21

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Solution

The fourth proportional to 9,519.45, 13,122.87 and 6,678.21 is: 9,206.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,519.45 : 13,122.87 = 6,678.21 : x
  2. Step 2: Convert to fraction form
    9,519.45/13,122.87 = 6,678.21/x
  3. Step 3: Cross multiply
    9,519.45x = 13,122.87 × 6,678.21
  4. Step 4: Simplify right side
    9,519.45x = 87,637,281.66
  5. Step 5: Solve for x
    x = 87,637,281.66/9,519.45
  6. Step 6: Final answer
    x = 9,206.13

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Half scale
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Double scale
Find fourth proportional to 9,520.45, 13,124.25 and 6,679.21
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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.