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Finding the Fourth Proportional to 9,387,510.80, 12,978,456.72 and 6,936,255.68

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Solution

The fourth proportional to 9,387,510.80, 12,978,456.72 and 6,936,255.68 is: 9,589,538.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,387,510.80 : 12,978,456.72 = 6,936,255.68 : x
  2. Step 2: Convert to fraction form
    9,387,510.80/12,978,456.72 = 6,936,255.68/x
  3. Step 3: Cross multiply
    9,387,510.80x = 12,978,456.72 × 6,936,255.68
  4. Step 4: Simplify right side
    9,387,510.80x = 90,021,894,141,734.17
  5. Step 5: Solve for x
    x = 90,021,894,141,734.17/9,387,510.80
  6. Step 6: Final answer
    x = 9,589,538.28

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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.