Home / 20,653,800.40-30,985,366.20-12,129,749.20

Finding the Fourth Proportional to 20,653,800.40, 30,985,366.20 and 12,129,749.20

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Solution

The fourth proportional to 20,653,800.40, 30,985,366.20 and 12,129,749.20 is: 18,197,363.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653,800.40 : 30,985,366.20 = 12,129,749.20 : x
  2. Step 2: Convert to fraction form
    20,653,800.40/30,985,366.20 = 12,129,749.20/x
  3. Step 3: Cross multiply
    20,653,800.40x = 30,985,366.20 × 12,129,749.20
  4. Step 4: Simplify right side
    20,653,800.40x = 375,844,720,876,157
  5. Step 5: Solve for x
    x = 375,844,720,876,157/20,653,800.40
  6. Step 6: Final answer
    x = 18,197,363.86

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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.