Home / 15,385.09-21,229.39-9,011.35

Finding the Fourth Proportional to 15,385.09, 21,229.39 and 9,011.35

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Solution

The fourth proportional to 15,385.09, 21,229.39 and 9,011.35 is: 12,434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,385.09 : 21,229.39 = 9,011.35 : x
  2. Step 2: Convert to fraction form
    15,385.09/21,229.39 = 9,011.35/x
  3. Step 3: Cross multiply
    15,385.09x = 21,229.39 × 9,011.35
  4. Step 4: Simplify right side
    15,385.09x = 191,305,501.38
  5. Step 5: Solve for x
    x = 191,305,501.38/15,385.09
  6. Step 6: Final answer
    x = 12,434.47

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Double scale
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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.