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Finding the Fourth Proportional to 47,008.80, 70,529.40 and 20,732.40

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Solution

The fourth proportional to 47,008.80, 70,529.40 and 20,732.40 is: 31,105.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,008.80 : 70,529.40 = 20,732.40 : x
  2. Step 2: Convert to fraction form
    47,008.80/70,529.40 = 20,732.40/x
  3. Step 3: Cross multiply
    47,008.80x = 70,529.40 × 20,732.40
  4. Step 4: Simplify right side
    47,008.80x = 1,462,243,732.56
  5. Step 5: Solve for x
    x = 1,462,243,732.56/47,008.80
  6. Step 6: Final answer
    x = 31,105.74

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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.