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Finding the Fourth Proportional to 15,165.80, 22,748.70 and 13,780.70

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Solution

The fourth proportional to 15,165.80, 22,748.70 and 13,780.70 is: 20,671.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,165.80 : 22,748.70 = 13,780.70 : x
  2. Step 2: Convert to fraction form
    15,165.80/22,748.70 = 13,780.70/x
  3. Step 3: Cross multiply
    15,165.80x = 22,748.70 × 13,780.70
  4. Step 4: Simplify right side
    15,165.80x = 313,493,010.09
  5. Step 5: Solve for x
    x = 313,493,010.09/15,165.80
  6. Step 6: Final answer
    x = 20,671.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.