Home / 5,187.39-7,781.18-1,291.82

Finding the Fourth Proportional to 5,187.39, 7,781.18 and 1,291.82

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Solution

The fourth proportional to 5,187.39, 7,781.18 and 1,291.82 is: 1,937.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.39 : 7,781.18 = 1,291.82 : x
  2. Step 2: Convert to fraction form
    5,187.39/7,781.18 = 1,291.82/x
  3. Step 3: Cross multiply
    5,187.39x = 7,781.18 × 1,291.82
  4. Step 4: Simplify right side
    5,187.39x = 10,051,838.58
  5. Step 5: Solve for x
    x = 10,051,838.58/5,187.39
  6. Step 6: Final answer
    x = 1,937.74

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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.