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Finding the Fourth Proportional to 28,158.84, 38,863.60 and 16,824.71

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Solution

The fourth proportional to 28,158.84, 38,863.60 and 16,824.71 is: 23,220.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,158.84 : 38,863.60 = 16,824.71 : x
  2. Step 2: Convert to fraction form
    28,158.84/38,863.60 = 16,824.71/x
  3. Step 3: Cross multiply
    28,158.84x = 38,863.60 × 16,824.71
  4. Step 4: Simplify right side
    28,158.84x = 653,868,854.65
  5. Step 5: Solve for x
    x = 653,868,854.65/28,158.84
  6. Step 6: Final answer
    x = 23,220.73

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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.