Home / 20,698.88-28,531.16-13,982.40

Finding the Fourth Proportional to 20,698.88, 28,531.16 and 13,982.40

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Solution

The fourth proportional to 20,698.88, 28,531.16 and 13,982.40 is: 19,273.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,698.88 : 28,531.16 = 13,982.40 : x
  2. Step 2: Convert to fraction form
    20,698.88/28,531.16 = 13,982.40/x
  3. Step 3: Cross multiply
    20,698.88x = 28,531.16 × 13,982.40
  4. Step 4: Simplify right side
    20,698.88x = 398,934,091.58
  5. Step 5: Solve for x
    x = 398,934,091.58/20,698.88
  6. Step 6: Final answer
    x = 19,273.22

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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.