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Finding the Fourth Proportional to 28,652.76, 39,540.17 and 15,905.19

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Solution

The fourth proportional to 28,652.76, 39,540.17 and 15,905.19 is: 21,948.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,652.76 : 39,540.17 = 15,905.19 : x
  2. Step 2: Convert to fraction form
    28,652.76/39,540.17 = 15,905.19/x
  3. Step 3: Cross multiply
    28,652.76x = 39,540.17 × 15,905.19
  4. Step 4: Simplify right side
    28,652.76x = 628,893,836.96
  5. Step 5: Solve for x
    x = 628,893,836.96/28,652.76
  6. Step 6: Final answer
    x = 21,948.80

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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.