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Finding the Fourth Proportional to 8,956.43, 12,359.80 and 4,977.47

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Solution

The fourth proportional to 8,956.43, 12,359.80 and 4,977.47 is: 6,868.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,956.43 : 12,359.80 = 4,977.47 : x
  2. Step 2: Convert to fraction form
    8,956.43/12,359.80 = 4,977.47/x
  3. Step 3: Cross multiply
    8,956.43x = 12,359.80 × 4,977.47
  4. Step 4: Simplify right side
    8,956.43x = 61,520,533.71
  5. Step 5: Solve for x
    x = 61,520,533.71/8,956.43
  6. Step 6: Final answer
    x = 6,868.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.