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Finding the Fourth Proportional to 28,142.70, 38,836.71 and 16,817.10

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Solution

The fourth proportional to 28,142.70, 38,836.71 and 16,817.10 is: 23,207.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,142.70 : 38,836.71 = 16,817.10 : x
  2. Step 2: Convert to fraction form
    28,142.70/38,836.71 = 16,817.10/x
  3. Step 3: Cross multiply
    28,142.70x = 38,836.71 × 16,817.10
  4. Step 4: Simplify right side
    28,142.70x = 653,120,835.74
  5. Step 5: Solve for x
    x = 653,120,835.74/28,142.70
  6. Step 6: Final answer
    x = 23,207.47

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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.