Home / 20,531.41-28,337.45-11,579.09

Finding the Fourth Proportional to 20,531.41, 28,337.45 and 11,579.09

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Solution

The fourth proportional to 20,531.41, 28,337.45 and 11,579.09 is: 15,981.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,531.41 : 28,337.45 = 11,579.09 : x
  2. Step 2: Convert to fraction form
    20,531.41/28,337.45 = 11,579.09/x
  3. Step 3: Cross multiply
    20,531.41x = 28,337.45 × 11,579.09
  4. Step 4: Simplify right side
    20,531.41x = 328,121,684.34
  5. Step 5: Solve for x
    x = 328,121,684.34/20,531.41
  6. Step 6: Final answer
    x = 15,981.45

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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.