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Finding the Fourth Proportional to 28,244.68, 38,978.87 and 16,916.02

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Solution

The fourth proportional to 28,244.68, 38,978.87 and 16,916.02 is: 23,344.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,244.68 : 38,978.87 = 16,916.02 : x
  2. Step 2: Convert to fraction form
    28,244.68/38,978.87 = 16,916.02/x
  3. Step 3: Cross multiply
    28,244.68x = 38,978.87 × 16,916.02
  4. Step 4: Simplify right side
    28,244.68x = 659,367,289.34
  5. Step 5: Solve for x
    x = 659,367,289.34/28,244.68
  6. Step 6: Final answer
    x = 23,344.83

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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.