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Finding the Fourth Proportional to 21,757.61, 32,640.98 and 8,610.10

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Solution

The fourth proportional to 21,757.61, 32,640.98 and 8,610.10 is: 12,916.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,757.61 : 32,640.98 = 8,610.10 : x
  2. Step 2: Convert to fraction form
    21,757.61/32,640.98 = 8,610.10/x
  3. Step 3: Cross multiply
    21,757.61x = 32,640.98 × 8,610.10
  4. Step 4: Simplify right side
    21,757.61x = 281,041,977.25
  5. Step 5: Solve for x
    x = 281,041,977.25/21,757.61
  6. Step 6: Final answer
    x = 12,916.95

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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.