Home / 18,139.80-27,209.70-13,531.80

Finding the Fourth Proportional to 18,139.80, 27,209.70 and 13,531.80

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Solution

The fourth proportional to 18,139.80, 27,209.70 and 13,531.80 is: 20,297.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.80 : 27,209.70 = 13,531.80 : x
  2. Step 2: Convert to fraction form
    18,139.80/27,209.70 = 13,531.80/x
  3. Step 3: Cross multiply
    18,139.80x = 27,209.70 × 13,531.80
  4. Step 4: Simplify right side
    18,139.80x = 368,196,218.46
  5. Step 5: Solve for x
    x = 368,196,218.46/18,139.80
  6. Step 6: Final answer
    x = 20,297.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.