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Finding the Fourth Proportional to 14,700.55, 20,286.78 and 7,986.18

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Solution

The fourth proportional to 14,700.55, 20,286.78 and 7,986.18 is: 11,020.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,700.55 : 20,286.78 = 7,986.18 : x
  2. Step 2: Convert to fraction form
    14,700.55/20,286.78 = 7,986.18/x
  3. Step 3: Cross multiply
    14,700.55x = 20,286.78 × 7,986.18
  4. Step 4: Simplify right side
    14,700.55x = 162,013,770.68
  5. Step 5: Solve for x
    x = 162,013,770.68/14,700.55
  6. Step 6: Final answer
    x = 11,020.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.