Home / 21,156.61-31,753.95-11,304.31

Finding the Fourth Proportional to 21,156.61, 31,753.95 and 11,304.31

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Solution

The fourth proportional to 21,156.61, 31,753.95 and 11,304.31 is: 16,966.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,156.61 : 31,753.95 = 11,304.31 : x
  2. Step 2: Convert to fraction form
    21,156.61/31,753.95 = 11,304.31/x
  3. Step 3: Cross multiply
    21,156.61x = 31,753.95 × 11,304.31
  4. Step 4: Simplify right side
    21,156.61x = 358,956,494.52
  5. Step 5: Solve for x
    x = 358,956,494.52/21,156.61
  6. Step 6: Final answer
    x = 16,966.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.