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Finding the Fourth Proportional to 8,920.32, 12,305.08 and 7,024.92

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Solution

The fourth proportional to 8,920.32, 12,305.08 and 7,024.92 is: 9,690.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.32 : 12,305.08 = 7,024.92 : x
  2. Step 2: Convert to fraction form
    8,920.32/12,305.08 = 7,024.92/x
  3. Step 3: Cross multiply
    8,920.32x = 12,305.08 × 7,024.92
  4. Step 4: Simplify right side
    8,920.32x = 86,442,202.59
  5. Step 5: Solve for x
    x = 86,442,202.59/8,920.32
  6. Step 6: Final answer
    x = 9,690.48

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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.