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Finding the Fourth Proportional to 21,901.70, 32,834.55 and 9,431.30

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Solution

The fourth proportional to 21,901.70, 32,834.55 and 9,431.30 is: 14,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,901.70 : 32,834.55 = 9,431.30 : x
  2. Step 2: Convert to fraction form
    21,901.70/32,834.55 = 9,431.30/x
  3. Step 3: Cross multiply
    21,901.70x = 32,834.55 × 9,431.30
  4. Step 4: Simplify right side
    21,901.70x = 309,672,491.42
  5. Step 5: Solve for x
    x = 309,672,491.42/21,901.70
  6. Step 6: Final answer
    x = 14,139.20

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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.