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Finding the Fourth Proportional to 13,250.75, 18,288.47 and 7,661.75

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Solution

The fourth proportional to 13,250.75, 18,288.47 and 7,661.75 is: 10,574.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,250.75 : 18,288.47 = 7,661.75 : x
  2. Step 2: Convert to fraction form
    13,250.75/18,288.47 = 7,661.75/x
  3. Step 3: Cross multiply
    13,250.75x = 18,288.47 × 7,661.75
  4. Step 4: Simplify right side
    13,250.75x = 140,121,685.02
  5. Step 5: Solve for x
    x = 140,121,685.02/13,250.75
  6. Step 6: Final answer
    x = 10,574.62

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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.