Home / 20,992,985.34-31,585,531.05-12,479,694.18

Finding the Fourth Proportional to 20,992,985.34, 31,585,531.05 and 12,479,694.18

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Solution

The fourth proportional to 20,992,985.34, 31,585,531.05 and 12,479,694.18 is: 18,776,641.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992,985.34 : 31,585,531.05 = 12,479,694.18 : x
  2. Step 2: Convert to fraction form
    20,992,985.34/31,585,531.05 = 12,479,694.18/x
  3. Step 3: Cross multiply
    20,992,985.34x = 31,585,531.05 × 12,479,694.18
  4. Step 4: Simplify right side
    20,992,985.34x = 394,177,768,016,894.31
  5. Step 5: Solve for x
    x = 394,177,768,016,894.31/20,992,985.34
  6. Step 6: Final answer
    x = 18,776,641.89

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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.