Home / 13,987.68-20,961.86-11,899.43

Finding the Fourth Proportional to 13,987.68, 20,961.86 and 11,899.43

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Solution

The fourth proportional to 13,987.68, 20,961.86 and 11,899.43 is: 17,832.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,987.68 : 20,961.86 = 11,899.43 : x
  2. Step 2: Convert to fraction form
    13,987.68/20,961.86 = 11,899.43/x
  3. Step 3: Cross multiply
    13,987.68x = 20,961.86 × 11,899.43
  4. Step 4: Simplify right side
    13,987.68x = 249,434,209.20
  5. Step 5: Solve for x
    x = 249,434,209.20/13,987.68
  6. Step 6: Final answer
    x = 17,832.42

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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.