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Finding the Fourth Proportional to 18,479.86, 27,718.98 and 5,332.78

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Solution

The fourth proportional to 18,479.86, 27,718.98 and 5,332.78 is: 7,998.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,479.86 : 27,718.98 = 5,332.78 : x
  2. Step 2: Convert to fraction form
    18,479.86/27,718.98 = 5,332.78/x
  3. Step 3: Cross multiply
    18,479.86x = 27,718.98 × 5,332.78
  4. Step 4: Simplify right side
    18,479.86x = 147,819,222.16
  5. Step 5: Solve for x
    x = 147,819,222.16/18,479.86
  6. Step 6: Final answer
    x = 7,998.94

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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.