Home / 14,279.10-21,418.65-12,748.20

Finding the Fourth Proportional to 14,279.10, 21,418.65 and 12,748.20

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Solution

The fourth proportional to 14,279.10, 21,418.65 and 12,748.20 is: 19,122.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,279.10 : 21,418.65 = 12,748.20 : x
  2. Step 2: Convert to fraction form
    14,279.10/21,418.65 = 12,748.20/x
  3. Step 3: Cross multiply
    14,279.10x = 21,418.65 × 12,748.20
  4. Step 4: Simplify right side
    14,279.10x = 273,049,233.93
  5. Step 5: Solve for x
    x = 273,049,233.93/14,279.10
  6. Step 6: Final answer
    x = 19,122.30

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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.