Home / 20,983,531.76-31,440,500.72-12,761,303.96

Finding the Fourth Proportional to 20,983,531.76, 31,440,500.72 and 12,761,303.96

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Solution

The fourth proportional to 20,983,531.76, 31,440,500.72 and 12,761,303.96 is: 19,120,793.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,983,531.76 : 31,440,500.72 = 12,761,303.96 : x
  2. Step 2: Convert to fraction form
    20,983,531.76/31,440,500.72 = 12,761,303.96/x
  3. Step 3: Cross multiply
    20,983,531.76x = 31,440,500.72 × 12,761,303.96
  4. Step 4: Simplify right side
    20,983,531.76x = 401,221,786,342,518.88
  5. Step 5: Solve for x
    x = 401,221,786,342,518.88/20,983,531.76
  6. Step 6: Final answer
    x = 19,120,793.91

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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.