Home / 20,812.17-28,721.48-11,380.73

Finding the Fourth Proportional to 20,812.17, 28,721.48 and 11,380.73

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Solution

The fourth proportional to 20,812.17, 28,721.48 and 11,380.73 is: 15,705.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,812.17 : 28,721.48 = 11,380.73 : x
  2. Step 2: Convert to fraction form
    20,812.17/28,721.48 = 11,380.73/x
  3. Step 3: Cross multiply
    20,812.17x = 28,721.48 × 11,380.73
  4. Step 4: Simplify right side
    20,812.17x = 326,871,509.34
  5. Step 5: Solve for x
    x = 326,871,509.34/20,812.17
  6. Step 6: Final answer
    x = 15,705.79

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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.