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Finding the Fourth Proportional to 47,956.80, 71,934.72 and 12,418.08

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Solution

The fourth proportional to 47,956.80, 71,934.72 and 12,418.08 is: 18,627.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,956.80 : 71,934.72 = 12,418.08 : x
  2. Step 2: Convert to fraction form
    47,956.80/71,934.72 = 12,418.08/x
  3. Step 3: Cross multiply
    47,956.80x = 71,934.72 × 12,418.08
  4. Step 4: Simplify right side
    47,956.80x = 893,291,107.74
  5. Step 5: Solve for x
    x = 893,291,107.74/47,956.80
  6. Step 6: Final answer
    x = 18,627.00

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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.