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Finding the Fourth Proportional to 8,712.46, 12,019.92 and 5,352.58

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Solution

The fourth proportional to 8,712.46, 12,019.92 and 5,352.58 is: 7,384.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.46 : 12,019.92 = 5,352.58 : x
  2. Step 2: Convert to fraction form
    8,712.46/12,019.92 = 5,352.58/x
  3. Step 3: Cross multiply
    8,712.46x = 12,019.92 × 5,352.58
  4. Step 4: Simplify right side
    8,712.46x = 64,337,583.39
  5. Step 5: Solve for x
    x = 64,337,583.39/8,712.46
  6. Step 6: Final answer
    x = 7,384.55

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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.