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Finding the Fourth Proportional to 8,889.86, 13,356.66 and 6,691.92

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Solution

The fourth proportional to 8,889.86, 13,356.66 and 6,691.92 is: 10,054.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889.86 : 13,356.66 = 6,691.92 : x
  2. Step 2: Convert to fraction form
    8,889.86/13,356.66 = 6,691.92/x
  3. Step 3: Cross multiply
    8,889.86x = 13,356.66 × 6,691.92
  4. Step 4: Simplify right side
    8,889.86x = 89,381,700.19
  5. Step 5: Solve for x
    x = 89,381,700.19/8,889.86
  6. Step 6: Final answer
    x = 10,054.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.