Home / 20,971,331.60-31,394,011.80-12,447,280.40

Finding the Fourth Proportional to 20,971,331.60, 31,394,011.80 and 12,447,280.40

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Solution

The fourth proportional to 20,971,331.60, 31,394,011.80 and 12,447,280.40 is: 18,633,536.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971,331.60 : 31,394,011.80 = 12,447,280.40 : x
  2. Step 2: Convert to fraction form
    20,971,331.60/31,394,011.80 = 12,447,280.40/x
  3. Step 3: Cross multiply
    20,971,331.60x = 31,394,011.80 × 12,447,280.40
  4. Step 4: Simplify right side
    20,971,331.60x = 390,770,067,755,508.75
  5. Step 5: Solve for x
    x = 390,770,067,755,508.75/20,971,331.60
  6. Step 6: Final answer
    x = 18,633,536.26

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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.