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Finding the Fourth Proportional to 21,989.80, 32,960.40 and 9,507.70

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Solution

The fourth proportional to 21,989.80, 32,960.40 and 9,507.70 is: 14,251.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,989.80 : 32,960.40 = 9,507.70 : x
  2. Step 2: Convert to fraction form
    21,989.80/32,960.40 = 9,507.70/x
  3. Step 3: Cross multiply
    21,989.80x = 32,960.40 × 9,507.70
  4. Step 4: Simplify right side
    21,989.80x = 313,377,595.08
  5. Step 5: Solve for x
    x = 313,377,595.08/21,989.80
  6. Step 6: Final answer
    x = 14,251.04

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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.