Home / 15,691.24-21,654.30-8,618.32

Finding the Fourth Proportional to 15,691.24, 21,654.30 and 8,618.32

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Solution

The fourth proportional to 15,691.24, 21,654.30 and 8,618.32 is: 11,893.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.24 : 21,654.30 = 8,618.32 : x
  2. Step 2: Convert to fraction form
    15,691.24/21,654.30 = 8,618.32/x
  3. Step 3: Cross multiply
    15,691.24x = 21,654.30 × 8,618.32
  4. Step 4: Simplify right side
    15,691.24x = 186,623,686.78
  5. Step 5: Solve for x
    x = 186,623,686.78/15,691.24
  6. Step 6: Final answer
    x = 11,893.50

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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.