Home / 15,691.43-21,654.18-8,618.30

Finding the Fourth Proportional to 15,691.43, 21,654.18 and 8,618.30

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Solution

The fourth proportional to 15,691.43, 21,654.18 and 8,618.30 is: 11,893.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.43 : 21,654.18 = 8,618.30 : x
  2. Step 2: Convert to fraction form
    15,691.43/21,654.18 = 8,618.30/x
  3. Step 3: Cross multiply
    15,691.43x = 21,654.18 × 8,618.30
  4. Step 4: Simplify right side
    15,691.43x = 186,622,219.49
  5. Step 5: Solve for x
    x = 186,622,219.49/15,691.43
  6. Step 6: Final answer
    x = 11,893.26

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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.