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Finding the Fourth Proportional to 21,952.80, 32,929.20 and 21,434.40

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Solution

The fourth proportional to 21,952.80, 32,929.20 and 21,434.40 is: 32,151.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,952.80 : 32,929.20 = 21,434.40 : x
  2. Step 2: Convert to fraction form
    21,952.80/32,929.20 = 21,434.40/x
  3. Step 3: Cross multiply
    21,952.80x = 32,929.20 × 21,434.40
  4. Step 4: Simplify right side
    21,952.80x = 705,817,644.48
  5. Step 5: Solve for x
    x = 705,817,644.48/21,952.80
  6. Step 6: Final answer
    x = 32,151.60

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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.