Home / 20,100.40-27,736.08-12,143.20

Finding the Fourth Proportional to 20,100.40, 27,736.08 and 12,143.20

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Solution

The fourth proportional to 20,100.40, 27,736.08 and 12,143.20 is: 16,756.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.40 : 27,736.08 = 12,143.20 : x
  2. Step 2: Convert to fraction form
    20,100.40/27,736.08 = 12,143.20/x
  3. Step 3: Cross multiply
    20,100.40x = 27,736.08 × 12,143.20
  4. Step 4: Simplify right side
    20,100.40x = 336,804,766.66
  5. Step 5: Solve for x
    x = 336,804,766.66/20,100.40
  6. Step 6: Final answer
    x = 16,756.12

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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.