Home / 20,963.76-28,930.80-11,532.72

Finding the Fourth Proportional to 20,963.76, 28,930.80 and 11,532.72

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Solution

The fourth proportional to 20,963.76, 28,930.80 and 11,532.72 is: 15,915.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,963.76 : 28,930.80 = 11,532.72 : x
  2. Step 2: Convert to fraction form
    20,963.76/28,930.80 = 11,532.72/x
  3. Step 3: Cross multiply
    20,963.76x = 28,930.80 × 11,532.72
  4. Step 4: Simplify right side
    20,963.76x = 333,650,815.78
  5. Step 5: Solve for x
    x = 333,650,815.78/20,963.76
  6. Step 6: Final answer
    x = 15,915.60

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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.