Home / 12,872.88-19,279.35-12,518.19

Finding the Fourth Proportional to 12,872.88, 19,279.35 and 12,518.19

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Solution

The fourth proportional to 12,872.88, 19,279.35 and 12,518.19 is: 18,748.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,872.88 : 19,279.35 = 12,518.19 : x
  2. Step 2: Convert to fraction form
    12,872.88/19,279.35 = 12,518.19/x
  3. Step 3: Cross multiply
    12,872.88x = 19,279.35 × 12,518.19
  4. Step 4: Simplify right side
    12,872.88x = 241,342,566.38
  5. Step 5: Solve for x
    x = 241,342,566.38/12,872.88
  6. Step 6: Final answer
    x = 18,748.14

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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.