Home / 7,887.12-11,819.52-4,378.68

Finding the Fourth Proportional to 7,887.12, 11,819.52 and 4,378.68

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Solution

The fourth proportional to 7,887.12, 11,819.52 and 4,378.68 is: 6,561.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,887.12 : 11,819.52 = 4,378.68 : x
  2. Step 2: Convert to fraction form
    7,887.12/11,819.52 = 4,378.68/x
  3. Step 3: Cross multiply
    7,887.12x = 11,819.52 × 4,378.68
  4. Step 4: Simplify right side
    7,887.12x = 51,753,895.83
  5. Step 5: Solve for x
    x = 51,753,895.83/7,887.12
  6. Step 6: Final answer
    x = 6,561.82

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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.