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Finding the Fourth Proportional to 8,517,290.40, 12,754,940.40 and 5,661,943.20

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Solution

The fourth proportional to 8,517,290.40, 12,754,940.40 and 5,661,943.20 is: 8,478,958.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,517,290.40 : 12,754,940.40 = 5,661,943.20 : x
  2. Step 2: Convert to fraction form
    8,517,290.40/12,754,940.40 = 5,661,943.20/x
  3. Step 3: Cross multiply
    8,517,290.40x = 12,754,940.40 × 5,661,943.20
  4. Step 4: Simplify right side
    8,517,290.40x = 72,217,748,064,185.28
  5. Step 5: Solve for x
    x = 72,217,748,064,185.28/8,517,290.40
  6. Step 6: Final answer
    x = 8,478,958.06

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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.