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Finding the Fourth Proportional to 8,939.40, 12,332.40 and 6,288.54

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Solution

The fourth proportional to 8,939.40, 12,332.40 and 6,288.54 is: 8,675.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,939.40 : 12,332.40 = 6,288.54 : x
  2. Step 2: Convert to fraction form
    8,939.40/12,332.40 = 6,288.54/x
  3. Step 3: Cross multiply
    8,939.40x = 12,332.40 × 6,288.54
  4. Step 4: Simplify right side
    8,939.40x = 77,552,790.70
  5. Step 5: Solve for x
    x = 77,552,790.70/8,939.40
  6. Step 6: Final answer
    x = 8,675.39

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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.