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Finding the Fourth Proportional to 13,908,765.80, 20,863,148.70 and 8,806,932.20

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Solution

The fourth proportional to 13,908,765.80, 20,863,148.70 and 8,806,932.20 is: 13,210,398.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,908,765.80 : 20,863,148.70 = 8,806,932.20 : x
  2. Step 2: Convert to fraction form
    13,908,765.80/20,863,148.70 = 8,806,932.20/x
  3. Step 3: Cross multiply
    13,908,765.80x = 20,863,148.70 × 8,806,932.20
  4. Step 4: Simplify right side
    13,908,765.80x = 183,740,336,079,418.12
  5. Step 5: Solve for x
    x = 183,740,336,079,418.12/13,908,765.80
  6. Step 6: Final answer
    x = 13,210,398.30

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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.