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Finding the Fourth Proportional to 8,992.71, 12,407.99 and 5,456.79

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Solution

The fourth proportional to 8,992.71, 12,407.99 and 5,456.79 is: 7,529.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,992.71 : 12,407.99 = 5,456.79 : x
  2. Step 2: Convert to fraction form
    8,992.71/12,407.99 = 5,456.79/x
  3. Step 3: Cross multiply
    8,992.71x = 12,407.99 × 5,456.79
  4. Step 4: Simplify right side
    8,992.71x = 67,707,768.47
  5. Step 5: Solve for x
    x = 67,707,768.47/8,992.71
  6. Step 6: Final answer
    x = 7,529.18

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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.