Home / 31,780.01-47,655.20-11,788.70

Finding the Fourth Proportional to 31,780.01, 47,655.20 and 11,788.70

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Solution

The fourth proportional to 31,780.01, 47,655.20 and 11,788.70 is: 17,677.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,780.01 : 47,655.20 = 11,788.70 : x
  2. Step 2: Convert to fraction form
    31,780.01/47,655.20 = 11,788.70/x
  3. Step 3: Cross multiply
    31,780.01x = 47,655.20 × 11,788.70
  4. Step 4: Simplify right side
    31,780.01x = 561,792,559.02
  5. Step 5: Solve for x
    x = 561,792,559.02/31,780.01
  6. Step 6: Final answer
    x = 17,677.55

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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.