Home / 20,910.62-28,862.19-12,948.32

Finding the Fourth Proportional to 20,910.62, 28,862.19 and 12,948.32

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Solution

The fourth proportional to 20,910.62, 28,862.19 and 12,948.32 is: 17,872.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.62 : 28,862.19 = 12,948.32 : x
  2. Step 2: Convert to fraction form
    20,910.62/28,862.19 = 12,948.32/x
  3. Step 3: Cross multiply
    20,910.62x = 28,862.19 × 12,948.32
  4. Step 4: Simplify right side
    20,910.62x = 373,716,944.18
  5. Step 5: Solve for x
    x = 373,716,944.18/20,910.62
  6. Step 6: Final answer
    x = 17,872.11

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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.