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Finding the Fourth Proportional to 8,976.90, 12,387.89 and 4,997.92

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Solution

The fourth proportional to 8,976.90, 12,387.89 and 4,997.92 is: 6,897.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.90 : 12,387.89 = 4,997.92 : x
  2. Step 2: Convert to fraction form
    8,976.90/12,387.89 = 4,997.92/x
  3. Step 3: Cross multiply
    8,976.90x = 12,387.89 × 4,997.92
  4. Step 4: Simplify right side
    8,976.90x = 61,913,683.19
  5. Step 5: Solve for x
    x = 61,913,683.19/8,976.90
  6. Step 6: Final answer
    x = 6,897.00

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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.