Home / 18,555.71-27,731.69-13,568.59

Finding the Fourth Proportional to 18,555.71, 27,731.69 and 13,568.59

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Solution

The fourth proportional to 18,555.71, 27,731.69 and 13,568.59 is: 20,278.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,555.71 : 27,731.69 = 13,568.59 : x
  2. Step 2: Convert to fraction form
    18,555.71/27,731.69 = 13,568.59/x
  3. Step 3: Cross multiply
    18,555.71x = 27,731.69 × 13,568.59
  4. Step 4: Simplify right side
    18,555.71x = 376,279,909.49
  5. Step 5: Solve for x
    x = 376,279,909.49/18,555.71
  6. Step 6: Final answer
    x = 20,278.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.