Home / 13,416.11-18,514.31-7,447.89

Finding the Fourth Proportional to 13,416.11, 18,514.31 and 7,447.89

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Solution

The fourth proportional to 13,416.11, 18,514.31 and 7,447.89 is: 10,278.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,416.11 : 18,514.31 = 7,447.89 : x
  2. Step 2: Convert to fraction form
    13,416.11/18,514.31 = 7,447.89/x
  3. Step 3: Cross multiply
    13,416.11x = 18,514.31 × 7,447.89
  4. Step 4: Simplify right side
    13,416.11x = 137,892,544.31
  5. Step 5: Solve for x
    x = 137,892,544.31/13,416.11
  6. Step 6: Final answer
    x = 10,278.13

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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.