Home / 20,129.04-27,761.02-12,960.20

Finding the Fourth Proportional to 20,129.04, 27,761.02 and 12,960.20

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Solution

The fourth proportional to 20,129.04, 27,761.02 and 12,960.20 is: 17,874.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.04 : 27,761.02 = 12,960.20 : x
  2. Step 2: Convert to fraction form
    20,129.04/27,761.02 = 12,960.20/x
  3. Step 3: Cross multiply
    20,129.04x = 27,761.02 × 12,960.20
  4. Step 4: Simplify right side
    20,129.04x = 359,788,371.40
  5. Step 5: Solve for x
    x = 359,788,371.40/20,129.04
  6. Step 6: Final answer
    x = 17,874.09

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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.