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Finding the Fourth Proportional to 18,715.41, 28,064.90 and 7,020.42

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Solution

The fourth proportional to 18,715.41, 28,064.90 and 7,020.42 is: 10,527.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.41 : 28,064.90 = 7,020.42 : x
  2. Step 2: Convert to fraction form
    18,715.41/28,064.90 = 7,020.42/x
  3. Step 3: Cross multiply
    18,715.41x = 28,064.90 × 7,020.42
  4. Step 4: Simplify right side
    18,715.41x = 197,027,350.16
  5. Step 5: Solve for x
    x = 197,027,350.16/18,715.41
  6. Step 6: Final answer
    x = 10,527.55

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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.