Home / 20,877.45-28,812.21-11,446.02

Finding the Fourth Proportional to 20,877.45, 28,812.21 and 11,446.02

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Solution

The fourth proportional to 20,877.45, 28,812.21 and 11,446.02 is: 15,796.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.45 : 28,812.21 = 11,446.02 : x
  2. Step 2: Convert to fraction form
    20,877.45/28,812.21 = 11,446.02/x
  3. Step 3: Cross multiply
    20,877.45x = 28,812.21 × 11,446.02
  4. Step 4: Simplify right side
    20,877.45x = 329,785,131.90
  5. Step 5: Solve for x
    x = 329,785,131.90/20,877.45
  6. Step 6: Final answer
    x = 15,796.24

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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.