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Finding the Fourth Proportional to 18,889.79, 28,316.21 and 7,034.87

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Solution

The fourth proportional to 18,889.79, 28,316.21 and 7,034.87 is: 10,545.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,889.79 : 28,316.21 = 7,034.87 : x
  2. Step 2: Convert to fraction form
    18,889.79/28,316.21 = 7,034.87/x
  3. Step 3: Cross multiply
    18,889.79x = 28,316.21 × 7,034.87
  4. Step 4: Simplify right side
    18,889.79x = 199,200,891.86
  5. Step 5: Solve for x
    x = 199,200,891.86/18,889.79
  6. Step 6: Final answer
    x = 10,545.43

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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.