Home / 20,531.88-28,335.42-11,580.21

Finding the Fourth Proportional to 20,531.88, 28,335.42 and 11,580.21

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Solution

The fourth proportional to 20,531.88, 28,335.42 and 11,580.21 is: 15,981.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.88 : 28,335.42 = 11,580.21 : x
  2. Step 2: Convert to fraction form
    20,531.88/28,335.42 = 11,580.21/x
  3. Step 3: Cross multiply
    20,531.88x = 28,335.42 × 11,580.21
  4. Step 4: Simplify right side
    20,531.88x = 328,130,114.04
  5. Step 5: Solve for x
    x = 328,130,114.04/20,531.88
  6. Step 6: Final answer
    x = 15,981.49

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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.