Home / 18,613.47-25,686.69-10,115.66

Finding the Fourth Proportional to 18,613.47, 25,686.69 and 10,115.66

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Solution

The fourth proportional to 18,613.47, 25,686.69 and 10,115.66 is: 13,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,613.47 : 25,686.69 = 10,115.66 : x
  2. Step 2: Convert to fraction form
    18,613.47/25,686.69 = 10,115.66/x
  3. Step 3: Cross multiply
    18,613.47x = 25,686.69 × 10,115.66
  4. Step 4: Simplify right side
    18,613.47x = 259,837,822.57
  5. Step 5: Solve for x
    x = 259,837,822.57/18,613.47
  6. Step 6: Final answer
    x = 13,959.67

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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.