Home / 15,731.38-21,683.10-13,495.78

Finding the Fourth Proportional to 15,731.38, 21,683.10 and 13,495.78

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Solution

The fourth proportional to 15,731.38, 21,683.10 and 13,495.78 is: 18,601.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,731.38 : 21,683.10 = 13,495.78 : x
  2. Step 2: Convert to fraction form
    15,731.38/21,683.10 = 13,495.78/x
  3. Step 3: Cross multiply
    15,731.38x = 21,683.10 × 13,495.78
  4. Step 4: Simplify right side
    15,731.38x = 292,630,347.32
  5. Step 5: Solve for x
    x = 292,630,347.32/15,731.38
  6. Step 6: Final answer
    x = 18,601.70

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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.