Home / 20,728,138.60-31,092,207.90-9,939,886.30

Finding the Fourth Proportional to 20,728,138.60, 31,092,207.90 and 9,939,886.30

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Solution

The fourth proportional to 20,728,138.60, 31,092,207.90 and 9,939,886.30 is: 14,909,829.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,728,138.60 : 31,092,207.90 = 9,939,886.30 : x
  2. Step 2: Convert to fraction form
    20,728,138.60/31,092,207.90 = 9,939,886.30/x
  3. Step 3: Cross multiply
    20,728,138.60x = 31,092,207.90 × 9,939,886.30
  4. Step 4: Simplify right side
    20,728,138.60x = 309,053,011,341,961.75
  5. Step 5: Solve for x
    x = 309,053,011,341,961.75/20,728,138.60
  6. Step 6: Final answer
    x = 14,909,829.45

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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.