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Finding the Fourth Proportional to 21,612.84, 32,411.04 and 9,917.84

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Solution

The fourth proportional to 21,612.84, 32,411.04 and 9,917.84 is: 14,872.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,612.84 : 32,411.04 = 9,917.84 : x
  2. Step 2: Convert to fraction form
    21,612.84/32,411.04 = 9,917.84/x
  3. Step 3: Cross multiply
    21,612.84x = 32,411.04 × 9,917.84
  4. Step 4: Simplify right side
    21,612.84x = 321,447,508.95
  5. Step 5: Solve for x
    x = 321,447,508.95/21,612.84
  6. Step 6: Final answer
    x = 14,872.99

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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.