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Finding the Fourth Proportional to 8,712.62, 12,020.76 and 4,935.18

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Solution

The fourth proportional to 8,712.62, 12,020.76 and 4,935.18 is: 6,809.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712.62 : 12,020.76 = 4,935.18 : x
  2. Step 2: Convert to fraction form
    8,712.62/12,020.76 = 4,935.18/x
  3. Step 3: Cross multiply
    8,712.62x = 12,020.76 × 4,935.18
  4. Step 4: Simplify right side
    8,712.62x = 59,324,614.34
  5. Step 5: Solve for x
    x = 59,324,614.34/8,712.62
  6. Step 6: Final answer
    x = 6,809.05

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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.