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Finding the Fourth Proportional to 21,787.79, 32,681.68 and 15,226.79

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Solution

The fourth proportional to 21,787.79, 32,681.68 and 15,226.79 is: 22,840.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,787.79 : 32,681.68 = 15,226.79 : x
  2. Step 2: Convert to fraction form
    21,787.79/32,681.68 = 15,226.79/x
  3. Step 3: Cross multiply
    21,787.79x = 32,681.68 × 15,226.79
  4. Step 4: Simplify right side
    21,787.79x = 497,636,876.73
  5. Step 5: Solve for x
    x = 497,636,876.73/21,787.79
  6. Step 6: Final answer
    x = 22,840.18

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1.5x scale

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.