Home / 20,689,672.91-28,549,600.71-12,740,951.70

Finding the Fourth Proportional to 20,689,672.91, 28,549,600.71 and 12,740,951.70

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Solution

The fourth proportional to 20,689,672.91, 28,549,600.71 and 12,740,951.70 is: 17,581,190.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689,672.91 : 28,549,600.71 = 12,740,951.70 : x
  2. Step 2: Convert to fraction form
    20,689,672.91/28,549,600.71 = 12,740,951.70/x
  3. Step 3: Cross multiply
    20,689,672.91x = 28,549,600.71 × 12,740,951.70
  4. Step 4: Simplify right side
    20,689,672.91x = 363,749,083,652,642.62
  5. Step 5: Solve for x
    x = 363,749,083,652,642.62/20,689,672.91
  6. Step 6: Final answer
    x = 17,581,190.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.