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Finding the Fourth Proportional to 7,928.68, 11,888.78 and 7,587.88

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Solution

The fourth proportional to 7,928.68, 11,888.78 and 7,587.88 is: 11,377.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,928.68 : 11,888.78 = 7,587.88 : x
  2. Step 2: Convert to fraction form
    7,928.68/11,888.78 = 7,587.88/x
  3. Step 3: Cross multiply
    7,928.68x = 11,888.78 × 7,587.88
  4. Step 4: Simplify right side
    7,928.68x = 90,210,635.99
  5. Step 5: Solve for x
    x = 90,210,635.99/7,928.68
  6. Step 6: Final answer
    x = 11,377.76

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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.