Home / 15,505.49-21,397.85-8,431.96

Finding the Fourth Proportional to 15,505.49, 21,397.85 and 8,431.96

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Solution

The fourth proportional to 15,505.49, 21,397.85 and 8,431.96 is: 11,636.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.49 : 21,397.85 = 8,431.96 : x
  2. Step 2: Convert to fraction form
    15,505.49/21,397.85 = 8,431.96/x
  3. Step 3: Cross multiply
    15,505.49x = 21,397.85 × 8,431.96
  4. Step 4: Simplify right side
    15,505.49x = 180,425,815.29
  5. Step 5: Solve for x
    x = 180,425,815.29/15,505.49
  6. Step 6: Final answer
    x = 11,636.25

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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.