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Finding the Fourth Proportional to 20,751.70, 28,637.64 and 11,799.18

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Solution

The fourth proportional to 20,751.70, 28,637.64 and 11,799.18 is: 16,283.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,751.70 : 28,637.64 = 11,799.18 : x
  2. Step 2: Convert to fraction form
    20,751.70/28,637.64 = 11,799.18/x
  3. Step 3: Cross multiply
    20,751.70x = 28,637.64 × 11,799.18
  4. Step 4: Simplify right side
    20,751.70x = 337,900,669.14
  5. Step 5: Solve for x
    x = 337,900,669.14/20,751.70
  6. Step 6: Final answer
    x = 16,283.04

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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.