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Finding the Fourth Proportional to 8,889,981, 12,265,684.98 and 5,582,631.88

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Solution

The fourth proportional to 8,889,981, 12,265,684.98 and 5,582,631.88 is: 7,702,469.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,889,981 : 12,265,684.98 = 5,582,631.88 : x
  2. Step 2: Convert to fraction form
    8,889,981/12,265,684.98 = 5,582,631.88/x
  3. Step 3: Cross multiply
    8,889,981x = 12,265,684.98 × 5,582,631.88
  4. Step 4: Simplify right side
    8,889,981x = 68,474,803,999,385.16
  5. Step 5: Solve for x
    x = 68,474,803,999,385.16/8,889,981
  6. Step 6: Final answer
    x = 7,702,469.11

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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.