Home / 15,613.81-21,546.95-8,540.28

Finding the Fourth Proportional to 15,613.81, 21,546.95 and 8,540.28

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Solution

The fourth proportional to 15,613.81, 21,546.95 and 8,540.28 is: 11,785.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,613.81 : 21,546.95 = 8,540.28 : x
  2. Step 2: Convert to fraction form
    15,613.81/21,546.95 = 8,540.28/x
  3. Step 3: Cross multiply
    15,613.81x = 21,546.95 × 8,540.28
  4. Step 4: Simplify right side
    15,613.81x = 184,016,943.44
  5. Step 5: Solve for x
    x = 184,016,943.44/15,613.81
  6. Step 6: Final answer
    x = 11,785.53

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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.