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Finding the Fourth Proportional to 18,807.42, 28,211.23 and 5,659.70

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Solution

The fourth proportional to 18,807.42, 28,211.23 and 5,659.70 is: 8,489.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,807.42 : 28,211.23 = 5,659.70 : x
  2. Step 2: Convert to fraction form
    18,807.42/28,211.23 = 5,659.70/x
  3. Step 3: Cross multiply
    18,807.42x = 28,211.23 × 5,659.70
  4. Step 4: Simplify right side
    18,807.42x = 159,667,084.28
  5. Step 5: Solve for x
    x = 159,667,084.28/18,807.42
  6. Step 6: Final answer
    x = 8,489.58

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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.