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Finding the Fourth Proportional to 8,974.79, 12,385.65 and 5,438.33

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Solution

The fourth proportional to 8,974.79, 12,385.65 and 5,438.33 is: 7,505.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,974.79 : 12,385.65 = 5,438.33 : x
  2. Step 2: Convert to fraction form
    8,974.79/12,385.65 = 5,438.33/x
  3. Step 3: Cross multiply
    8,974.79x = 12,385.65 × 5,438.33
  4. Step 4: Simplify right side
    8,974.79x = 67,357,190.04
  5. Step 5: Solve for x
    x = 67,357,190.04/8,974.79
  6. Step 6: Final answer
    x = 7,505.16

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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.