Home / 20,765.57-28,655.17-11,812.53

Finding the Fourth Proportional to 20,765.57, 28,655.17 and 11,812.53

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Solution

The fourth proportional to 20,765.57, 28,655.17 and 11,812.53 is: 16,300.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.57 : 28,655.17 = 11,812.53 : x
  2. Step 2: Convert to fraction form
    20,765.57/28,655.17 = 11,812.53/x
  3. Step 3: Cross multiply
    20,765.57x = 28,655.17 × 11,812.53
  4. Step 4: Simplify right side
    20,765.57x = 338,490,133.21
  5. Step 5: Solve for x
    x = 338,490,133.21/20,765.57
  6. Step 6: Final answer
    x = 16,300.55

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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.