Home / 20,872.88-31,456.07-18,795.24

Finding the Fourth Proportional to 20,872.88, 31,456.07 and 18,795.24

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Solution

The fourth proportional to 20,872.88, 31,456.07 and 18,795.24 is: 28,325.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.88 : 31,456.07 = 18,795.24 : x
  2. Step 2: Convert to fraction form
    20,872.88/31,456.07 = 18,795.24/x
  3. Step 3: Cross multiply
    20,872.88x = 31,456.07 × 18,795.24
  4. Step 4: Simplify right side
    20,872.88x = 591,224,385.11
  5. Step 5: Solve for x
    x = 591,224,385.11/20,872.88
  6. Step 6: Final answer
    x = 28,325.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.