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Finding the Fourth Proportional to 28,794.28, 39,753.30 and 20,828.20

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Solution

The fourth proportional to 28,794.28, 39,753.30 and 20,828.20 is: 28,755.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,794.28 : 39,753.30 = 20,828.20 : x
  2. Step 2: Convert to fraction form
    28,794.28/39,753.30 = 20,828.20/x
  3. Step 3: Cross multiply
    28,794.28x = 39,753.30 × 20,828.20
  4. Step 4: Simplify right side
    28,794.28x = 827,989,683.06
  5. Step 5: Solve for x
    x = 827,989,683.06/28,794.28
  6. Step 6: Final answer
    x = 28,755.35

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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.