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Finding the Fourth Proportional to 18,480.56, 25,507.71 and 15,491.66

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Solution

The fourth proportional to 18,480.56, 25,507.71 and 15,491.66 is: 21,382.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,480.56 : 25,507.71 = 15,491.66 : x
  2. Step 2: Convert to fraction form
    18,480.56/25,507.71 = 15,491.66/x
  3. Step 3: Cross multiply
    18,480.56x = 25,507.71 × 15,491.66
  4. Step 4: Simplify right side
    18,480.56x = 395,156,643.16
  5. Step 5: Solve for x
    x = 395,156,643.16/18,480.56
  6. Step 6: Final answer
    x = 21,382.29

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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.