Home / 20,211.54-27,894.69-12,781.14

Finding the Fourth Proportional to 20,211.54, 27,894.69 and 12,781.14

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Solution

The fourth proportional to 20,211.54, 27,894.69 and 12,781.14 is: 17,639.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,211.54 : 27,894.69 = 12,781.14 : x
  2. Step 2: Convert to fraction form
    20,211.54/27,894.69 = 12,781.14/x
  3. Step 3: Cross multiply
    20,211.54x = 27,894.69 × 12,781.14
  4. Step 4: Simplify right side
    20,211.54x = 356,525,938.15
  5. Step 5: Solve for x
    x = 356,525,938.15/20,211.54
  6. Step 6: Final answer
    x = 17,639.72

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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.