Home / 28,343.28-39,115.26-15,768.30

Finding the Fourth Proportional to 28,343.28, 39,115.26 and 15,768.30

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Solution

The fourth proportional to 28,343.28, 39,115.26 and 15,768.30 is: 21,761.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.28 : 39,115.26 = 15,768.30 : x
  2. Step 2: Convert to fraction form
    28,343.28/39,115.26 = 15,768.30/x
  3. Step 3: Cross multiply
    28,343.28x = 39,115.26 × 15,768.30
  4. Step 4: Simplify right side
    28,343.28x = 616,781,154.26
  5. Step 5: Solve for x
    x = 616,781,154.26/28,343.28
  6. Step 6: Final answer
    x = 21,761.11

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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.