Home / 20,964.29-28,930.70-11,532.78

Finding the Fourth Proportional to 20,964.29, 28,930.70 and 11,532.78

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Solution

The fourth proportional to 20,964.29, 28,930.70 and 11,532.78 is: 15,915.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,964.29 : 28,930.70 = 11,532.78 : x
  2. Step 2: Convert to fraction form
    20,964.29/28,930.70 = 11,532.78/x
  3. Step 3: Cross multiply
    20,964.29x = 28,930.70 × 11,532.78
  4. Step 4: Simplify right side
    20,964.29x = 333,651,427.18
  5. Step 5: Solve for x
    x = 333,651,427.18/20,964.29
  6. Step 6: Final answer
    x = 15,915.23

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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.