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Finding the Fourth Proportional to 21,402.80, 32,104.20 and 21,184.10

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Solution

The fourth proportional to 21,402.80, 32,104.20 and 21,184.10 is: 31,776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,402.80 : 32,104.20 = 21,184.10 : x
  2. Step 2: Convert to fraction form
    21,402.80/32,104.20 = 21,184.10/x
  3. Step 3: Cross multiply
    21,402.80x = 32,104.20 × 21,184.10
  4. Step 4: Simplify right side
    21,402.80x = 680,098,583.22
  5. Step 5: Solve for x
    x = 680,098,583.22/21,402.80
  6. Step 6: Final answer
    x = 31,776.15

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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.