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Finding the Fourth Proportional to 8,976.40, 12,387.20 and 4,997.42

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Solution

The fourth proportional to 8,976.40, 12,387.20 and 4,997.42 is: 6,896.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.40 : 12,387.20 = 4,997.42 : x
  2. Step 2: Convert to fraction form
    8,976.40/12,387.20 = 4,997.42/x
  3. Step 3: Cross multiply
    8,976.40x = 12,387.20 × 4,997.42
  4. Step 4: Simplify right side
    8,976.40x = 61,904,041.02
  5. Step 5: Solve for x
    x = 61,904,041.02/8,976.40
  6. Step 6: Final answer
    x = 6,896.31

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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.