Home / 20,480.85-28,263.74-11,531.57

Finding the Fourth Proportional to 20,480.85, 28,263.74 and 11,531.57

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Solution

The fourth proportional to 20,480.85, 28,263.74 and 11,531.57 is: 15,913.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,480.85 : 28,263.74 = 11,531.57 : x
  2. Step 2: Convert to fraction form
    20,480.85/28,263.74 = 11,531.57/x
  3. Step 3: Cross multiply
    20,480.85x = 28,263.74 × 11,531.57
  4. Step 4: Simplify right side
    20,480.85x = 325,925,097.30
  5. Step 5: Solve for x
    x = 325,925,097.30/20,480.85
  6. Step 6: Final answer
    x = 15,913.65

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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.