Home / 20,865,154.20-31,297,731.30-13,212,403.80

Finding the Fourth Proportional to 20,865,154.20, 31,297,731.30 and 13,212,403.80

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Solution

The fourth proportional to 20,865,154.20, 31,297,731.30 and 13,212,403.80 is: 19,818,605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,865,154.20 : 31,297,731.30 = 13,212,403.80 : x
  2. Step 2: Convert to fraction form
    20,865,154.20/31,297,731.30 = 13,212,403.80/x
  3. Step 3: Cross multiply
    20,865,154.20x = 31,297,731.30 × 13,212,403.80
  4. Step 4: Simplify right side
    20,865,154.20x = 413,518,263,959,499
  5. Step 5: Solve for x
    x = 413,518,263,959,499/20,865,154.20
  6. Step 6: Final answer
    x = 19,818,605.70

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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.