Home / 13,178.09-18,186.53-7,514.57

Finding the Fourth Proportional to 13,178.09, 18,186.53 and 7,514.57

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Solution

The fourth proportional to 13,178.09, 18,186.53 and 7,514.57 is: 10,370.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,178.09 : 18,186.53 = 7,514.57 : x
  2. Step 2: Convert to fraction form
    13,178.09/18,186.53 = 7,514.57/x
  3. Step 3: Cross multiply
    13,178.09x = 18,186.53 × 7,514.57
  4. Step 4: Simplify right side
    13,178.09x = 136,663,960.64
  5. Step 5: Solve for x
    x = 136,663,960.64/13,178.09
  6. Step 6: Final answer
    x = 10,370.54

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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.