Home / 18,781.93-28,135.23-8,930.71

Finding the Fourth Proportional to 18,781.93, 28,135.23 and 8,930.71

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Solution

The fourth proportional to 18,781.93, 28,135.23 and 8,930.71 is: 13,378.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,781.93 : 28,135.23 = 8,930.71 : x
  2. Step 2: Convert to fraction form
    18,781.93/28,135.23 = 8,930.71/x
  3. Step 3: Cross multiply
    18,781.93x = 28,135.23 × 8,930.71
  4. Step 4: Simplify right side
    18,781.93x = 251,267,579.91
  5. Step 5: Solve for x
    x = 251,267,579.91/18,781.93
  6. Step 6: Final answer
    x = 13,378.16

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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.