Home / 5,187.32-7,780.91-1,291.76

Finding the Fourth Proportional to 5,187.32, 7,780.91 and 1,291.76

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Solution

The fourth proportional to 5,187.32, 7,780.91 and 1,291.76 is: 1,937.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,187.32 : 7,780.91 = 1,291.76 : x
  2. Step 2: Convert to fraction form
    5,187.32/7,780.91 = 1,291.76/x
  3. Step 3: Cross multiply
    5,187.32x = 7,780.91 × 1,291.76
  4. Step 4: Simplify right side
    5,187.32x = 10,051,022.94
  5. Step 5: Solve for x
    x = 10,051,022.94/5,187.32
  6. Step 6: Final answer
    x = 1,937.62

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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.