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Finding the Fourth Proportional to 18,864.96, 28,287.72 and 12,950.88

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Solution

The fourth proportional to 18,864.96, 28,287.72 and 12,950.88 is: 19,419.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,864.96 : 28,287.72 = 12,950.88 : x
  2. Step 2: Convert to fraction form
    18,864.96/28,287.72 = 12,950.88/x
  3. Step 3: Cross multiply
    18,864.96x = 28,287.72 × 12,950.88
  4. Step 4: Simplify right side
    18,864.96x = 366,350,867.19
  5. Step 5: Solve for x
    x = 366,350,867.19/18,864.96
  6. Step 6: Final answer
    x = 19,419.65

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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.