Home / 20,982,819.60-31,474,229.40-12,458,768.40

Finding the Fourth Proportional to 20,982,819.60, 31,474,229.40 and 12,458,768.40

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Solution

The fourth proportional to 20,982,819.60, 31,474,229.40 and 12,458,768.40 is: 18,688,152.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982,819.60 : 31,474,229.40 = 12,458,768.40 : x
  2. Step 2: Convert to fraction form
    20,982,819.60/31,474,229.40 = 12,458,768.40/x
  3. Step 3: Cross multiply
    20,982,819.60x = 31,474,229.40 × 12,458,768.40
  4. Step 4: Simplify right side
    20,982,819.60x = 392,130,134,663,070.94
  5. Step 5: Solve for x
    x = 392,130,134,663,070.94/20,982,819.60
  6. Step 6: Final answer
    x = 18,688,152.60

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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.