Home / 15,613.81-21,546.78-8,540.08

Finding the Fourth Proportional to 15,613.81, 21,546.78 and 8,540.08

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Solution

The fourth proportional to 15,613.81, 21,546.78 and 8,540.08 is: 11,785.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,613.81 : 21,546.78 = 8,540.08 : x
  2. Step 2: Convert to fraction form
    15,613.81/21,546.78 = 8,540.08/x
  3. Step 3: Cross multiply
    15,613.81x = 21,546.78 × 8,540.08
  4. Step 4: Simplify right side
    15,613.81x = 184,011,171.08
  5. Step 5: Solve for x
    x = 184,011,171.08/15,613.81
  6. Step 6: Final answer
    x = 11,785.16

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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.