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Finding the Fourth Proportional to 12,447,934.20, 18,671,901.30 and 11,969,637.30

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Solution

The fourth proportional to 12,447,934.20, 18,671,901.30 and 11,969,637.30 is: 17,954,455.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,447,934.20 : 18,671,901.30 = 11,969,637.30 : x
  2. Step 2: Convert to fraction form
    12,447,934.20/18,671,901.30 = 11,969,637.30/x
  3. Step 3: Cross multiply
    12,447,934.20x = 18,671,901.30 × 11,969,637.30
  4. Step 4: Simplify right side
    12,447,934.20x = 223,495,886,262,398.50
  5. Step 5: Solve for x
    x = 223,495,886,262,398.50/12,447,934.20
  6. Step 6: Final answer
    x = 17,954,455.95

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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.