Home / 18,885.06-28,331.01-7,785.57

Finding the Fourth Proportional to 18,885.06, 28,331.01 and 7,785.57

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Solution

The fourth proportional to 18,885.06, 28,331.01 and 7,785.57 is: 11,679.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,885.06 : 28,331.01 = 7,785.57 : x
  2. Step 2: Convert to fraction form
    18,885.06/28,331.01 = 7,785.57/x
  3. Step 3: Cross multiply
    18,885.06x = 28,331.01 × 7,785.57
  4. Step 4: Simplify right side
    18,885.06x = 220,573,061.53
  5. Step 5: Solve for x
    x = 220,573,061.53/18,885.06
  6. Step 6: Final answer
    x = 11,679.76

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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.