Home / 15,431.81-21,295.92-8,358.24

Finding the Fourth Proportional to 15,431.81, 21,295.92 and 8,358.24

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Solution

The fourth proportional to 15,431.81, 21,295.92 and 8,358.24 is: 11,534.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,431.81 : 21,295.92 = 8,358.24 : x
  2. Step 2: Convert to fraction form
    15,431.81/21,295.92 = 8,358.24/x
  3. Step 3: Cross multiply
    15,431.81x = 21,295.92 × 8,358.24
  4. Step 4: Simplify right side
    15,431.81x = 177,996,368.59
  5. Step 5: Solve for x
    x = 177,996,368.59/15,431.81
  6. Step 6: Final answer
    x = 11,534.38

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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.