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Finding the Fourth Proportional to 18,869.68, 28,318.12 and 7,025.10

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Solution

The fourth proportional to 18,869.68, 28,318.12 and 7,025.10 is: 10,542.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,869.68 : 28,318.12 = 7,025.10 : x
  2. Step 2: Convert to fraction form
    18,869.68/28,318.12 = 7,025.10/x
  3. Step 3: Cross multiply
    18,869.68x = 28,318.12 × 7,025.10
  4. Step 4: Simplify right side
    18,869.68x = 198,937,749.87
  5. Step 5: Solve for x
    x = 198,937,749.87/18,869.68
  6. Step 6: Final answer
    x = 10,542.72

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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.