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Finding the Fourth Proportional to 21,320.01, 31,990.80 and 14,209.10

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Solution

The fourth proportional to 21,320.01, 31,990.80 and 14,209.10 is: 21,320.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,320.01 : 31,990.80 = 14,209.10 : x
  2. Step 2: Convert to fraction form
    21,320.01/31,990.80 = 14,209.10/x
  3. Step 3: Cross multiply
    21,320.01x = 31,990.80 × 14,209.10
  4. Step 4: Simplify right side
    21,320.01x = 454,560,591.78
  5. Step 5: Solve for x
    x = 454,560,591.78/21,320.01
  6. Step 6: Final answer
    x = 21,320.84

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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.