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Finding the Fourth Proportional to 18,894.16, 28,279.48 and 13,895.20

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Solution

The fourth proportional to 18,894.16, 28,279.48 and 13,895.20 is: 20,797.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,894.16 : 28,279.48 = 13,895.20 : x
  2. Step 2: Convert to fraction form
    18,894.16/28,279.48 = 13,895.20/x
  3. Step 3: Cross multiply
    18,894.16x = 28,279.48 × 13,895.20
  4. Step 4: Simplify right side
    18,894.16x = 392,948,898.09
  5. Step 5: Solve for x
    x = 392,948,898.09/18,894.16
  6. Step 6: Final answer
    x = 20,797.37

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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.