Home / 20,532.75-28,335.63-11,578.55

Finding the Fourth Proportional to 20,532.75, 28,335.63 and 11,578.55

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Solution

The fourth proportional to 20,532.75, 28,335.63 and 11,578.55 is: 15,978.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,532.75 : 28,335.63 = 11,578.55 : x
  2. Step 2: Convert to fraction form
    20,532.75/28,335.63 = 11,578.55/x
  3. Step 3: Cross multiply
    20,532.75x = 28,335.63 × 11,578.55
  4. Step 4: Simplify right side
    20,532.75x = 328,085,367.06
  5. Step 5: Solve for x
    x = 328,085,367.06/20,532.75
  6. Step 6: Final answer
    x = 15,978.64

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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.