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Finding the Fourth Proportional to 47,636.32, 71,433.76 and 20,981.76

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Solution

The fourth proportional to 47,636.32, 71,433.76 and 20,981.76 is: 31,463.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,636.32 : 71,433.76 = 20,981.76 : x
  2. Step 2: Convert to fraction form
    47,636.32/71,433.76 = 20,981.76/x
  3. Step 3: Cross multiply
    47,636.32x = 71,433.76 × 20,981.76
  4. Step 4: Simplify right side
    47,636.32x = 1,498,806,008.22
  5. Step 5: Solve for x
    x = 1,498,806,008.22/47,636.32
  6. Step 6: Final answer
    x = 31,463.51

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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.