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Finding the Fourth Proportional to 15,661.62, 21,613.43 and 8,588.16

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Solution

The fourth proportional to 15,661.62, 21,613.43 and 8,588.16 is: 11,851.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.62 : 21,613.43 = 8,588.16 : x
  2. Step 2: Convert to fraction form
    15,661.62/21,613.43 = 8,588.16/x
  3. Step 3: Cross multiply
    15,661.62x = 21,613.43 × 8,588.16
  4. Step 4: Simplify right side
    15,661.62x = 185,619,616.46
  5. Step 5: Solve for x
    x = 185,619,616.46/15,661.62
  6. Step 6: Final answer
    x = 11,851.88

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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.