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Finding the Fourth Proportional to 20,475.29, 28,255.23 and 11,523.29

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Solution

The fourth proportional to 20,475.29, 28,255.23 and 11,523.29 is: 15,901.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,475.29 : 28,255.23 = 11,523.29 : x
  2. Step 2: Convert to fraction form
    20,475.29/28,255.23 = 11,523.29/x
  3. Step 3: Cross multiply
    20,475.29x = 28,255.23 × 11,523.29
  4. Step 4: Simplify right side
    20,475.29x = 325,593,068.03
  5. Step 5: Solve for x
    x = 325,593,068.03/20,475.29
  6. Step 6: Final answer
    x = 15,901.76

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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.