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Finding the Fourth Proportional to 18,813.52, 28,229.55 and 13,302.28

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Solution

The fourth proportional to 18,813.52, 28,229.55 and 13,302.28 is: 19,959.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.52 : 28,229.55 = 13,302.28 : x
  2. Step 2: Convert to fraction form
    18,813.52/28,229.55 = 13,302.28/x
  3. Step 3: Cross multiply
    18,813.52x = 28,229.55 × 13,302.28
  4. Step 4: Simplify right side
    18,813.52x = 375,517,378.37
  5. Step 5: Solve for x
    x = 375,517,378.37/18,813.52
  6. Step 6: Final answer
    x = 19,959.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.