Home / 13,415,999.90-20,123,999.85-12,471,215.90

Finding the Fourth Proportional to 13,415,999.90, 20,123,999.85 and 12,471,215.90

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Solution

The fourth proportional to 13,415,999.90, 20,123,999.85 and 12,471,215.90 is: 18,706,823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415,999.90 : 20,123,999.85 = 12,471,215.90 : x
  2. Step 2: Convert to fraction form
    13,415,999.90/20,123,999.85 = 12,471,215.90/x
  3. Step 3: Cross multiply
    13,415,999.90x = 20,123,999.85 × 12,471,215.90
  4. Step 4: Simplify right side
    13,415,999.90x = 250,970,746,900,917.66
  5. Step 5: Solve for x
    x = 250,970,746,900,917.66/13,415,999.90
  6. Step 6: Final answer
    x = 18,706,823.85

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1.5x scale

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.