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Finding the Fourth Proportional to 20,228,978.40, 30,371,461.20 and 15,973,951.20

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Solution

The fourth proportional to 20,228,978.40, 30,371,461.20 and 15,973,951.20 is: 23,983,032.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,228,978.40 : 30,371,461.20 = 15,973,951.20 : x
  2. Step 2: Convert to fraction form
    20,228,978.40/30,371,461.20 = 15,973,951.20/x
  3. Step 3: Cross multiply
    20,228,978.40x = 30,371,461.20 × 15,973,951.20
  4. Step 4: Simplify right side
    20,228,978.40x = 485,152,239,081,493.38
  5. Step 5: Solve for x
    x = 485,152,239,081,493.38/20,228,978.40
  6. Step 6: Final answer
    x = 23,983,032.14

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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.