Home / 21,278,915.20-31,922,856.18-6,900,861.90

Finding the Fourth Proportional to 21,278,915.20, 31,922,856.18 and 6,900,861.90

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Solution

The fourth proportional to 21,278,915.20, 31,922,856.18 and 6,900,861.90 is: 10,352,746.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278,915.20 : 31,922,856.18 = 6,900,861.90 : x
  2. Step 2: Convert to fraction form
    21,278,915.20/31,922,856.18 = 6,900,861.90/x
  3. Step 3: Cross multiply
    21,278,915.20x = 31,922,856.18 × 6,900,861.90
  4. Step 4: Simplify right side
    21,278,915.20x = 220,295,221,792,127.25
  5. Step 5: Solve for x
    x = 220,295,221,792,127.25/21,278,915.20
  6. Step 6: Final answer
    x = 10,352,746.83

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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.