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Finding the Fourth Proportional to 8,900.57, 12,283.70 and 5,123.88

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Solution

The fourth proportional to 8,900.57, 12,283.70 and 5,123.88 is: 7,071.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,900.57 : 12,283.70 = 5,123.88 : x
  2. Step 2: Convert to fraction form
    8,900.57/12,283.70 = 5,123.88/x
  3. Step 3: Cross multiply
    8,900.57x = 12,283.70 × 5,123.88
  4. Step 4: Simplify right side
    8,900.57x = 62,940,179.14
  5. Step 5: Solve for x
    x = 62,940,179.14/8,900.57
  6. Step 6: Final answer
    x = 7,071.48

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1.5x scale

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.