Home / 20,841.60-28,758.74-11,888.57

Finding the Fourth Proportional to 20,841.60, 28,758.74 and 11,888.57

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Solution

The fourth proportional to 20,841.60, 28,758.74 and 11,888.57 is: 16,404.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,841.60 : 28,758.74 = 11,888.57 : x
  2. Step 2: Convert to fraction form
    20,841.60/28,758.74 = 11,888.57/x
  3. Step 3: Cross multiply
    20,841.60x = 28,758.74 × 11,888.57
  4. Step 4: Simplify right side
    20,841.60x = 341,900,306.06
  5. Step 5: Solve for x
    x = 341,900,306.06/20,841.60
  6. Step 6: Final answer
    x = 16,404.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.