Home / 20,117.56-27,781.16-12,960.04

Finding the Fourth Proportional to 20,117.56, 27,781.16 and 12,960.04

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Solution

The fourth proportional to 20,117.56, 27,781.16 and 12,960.04 is: 17,897.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.56 : 27,781.16 = 12,960.04 : x
  2. Step 2: Convert to fraction form
    20,117.56/27,781.16 = 12,960.04/x
  3. Step 3: Cross multiply
    20,117.56x = 27,781.16 × 12,960.04
  4. Step 4: Simplify right side
    20,117.56x = 360,044,944.85
  5. Step 5: Solve for x
    x = 360,044,944.85/20,117.56
  6. Step 6: Final answer
    x = 17,897.05

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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.