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Finding the Fourth Proportional to 28,470.65, 39,286.51 and 16,531.65

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Solution

The fourth proportional to 28,470.65, 39,286.51 and 16,531.65 is: 22,811.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,470.65 : 39,286.51 = 16,531.65 : x
  2. Step 2: Convert to fraction form
    28,470.65/39,286.51 = 16,531.65/x
  3. Step 3: Cross multiply
    28,470.65x = 39,286.51 × 16,531.65
  4. Step 4: Simplify right side
    28,470.65x = 649,470,833.04
  5. Step 5: Solve for x
    x = 649,470,833.04/28,470.65
  6. Step 6: Final answer
    x = 22,811.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.