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Finding the Fourth Proportional to 28,200.74, 38,917.02 and 16,870.71

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Solution

The fourth proportional to 28,200.74, 38,917.02 and 16,870.71 is: 23,281.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,200.74 : 38,917.02 = 16,870.71 : x
  2. Step 2: Convert to fraction form
    28,200.74/38,917.02 = 16,870.71/x
  3. Step 3: Cross multiply
    28,200.74x = 38,917.02 × 16,870.71
  4. Step 4: Simplify right side
    28,200.74x = 656,557,758.48
  5. Step 5: Solve for x
    x = 656,557,758.48/28,200.74
  6. Step 6: Final answer
    x = 23,281.58

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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.