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Finding the Fourth Proportional to 12,491.64, 17,232.48 and 9,128.88

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Solution

The fourth proportional to 12,491.64, 17,232.48 and 9,128.88 is: 12,593.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.64 : 17,232.48 = 9,128.88 : x
  2. Step 2: Convert to fraction form
    12,491.64/17,232.48 = 9,128.88/x
  3. Step 3: Cross multiply
    12,491.64x = 17,232.48 × 9,128.88
  4. Step 4: Simplify right side
    12,491.64x = 157,313,242.02
  5. Step 5: Solve for x
    x = 157,313,242.02/12,491.64
  6. Step 6: Final answer
    x = 12,593.48

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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.