Home / 15,431.71-21,295.77-8,358.13

Finding the Fourth Proportional to 15,431.71, 21,295.77 and 8,358.13

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Solution

The fourth proportional to 15,431.71, 21,295.77 and 8,358.13 is: 11,534.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.71 : 21,295.77 = 8,358.13 : x
  2. Step 2: Convert to fraction form
    15,431.71/21,295.77 = 8,358.13/x
  3. Step 3: Cross multiply
    15,431.71x = 21,295.77 × 8,358.13
  4. Step 4: Simplify right side
    15,431.71x = 177,992,814.11
  5. Step 5: Solve for x
    x = 177,992,814.11/15,431.71
  6. Step 6: Final answer
    x = 11,534.22

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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.