Home / 31,412.98-47,121.77-11,691.55

Finding the Fourth Proportional to 31,412.98, 47,121.77 and 11,691.55

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Solution

The fourth proportional to 31,412.98, 47,121.77 and 11,691.55 is: 17,538.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,412.98 : 47,121.77 = 11,691.55 : x
  2. Step 2: Convert to fraction form
    31,412.98/47,121.77 = 11,691.55/x
  3. Step 3: Cross multiply
    31,412.98x = 47,121.77 × 11,691.55
  4. Step 4: Simplify right side
    31,412.98x = 550,926,530.04
  5. Step 5: Solve for x
    x = 550,926,530.04/31,412.98
  6. Step 6: Final answer
    x = 17,538.18

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1.5x scale

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.