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Finding the Fourth Proportional to 13,047.75, 18,007.11 and 7,458.75

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Solution

The fourth proportional to 13,047.75, 18,007.11 and 7,458.75 is: 10,293.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,047.75 : 18,007.11 = 7,458.75 : x
  2. Step 2: Convert to fraction form
    13,047.75/18,007.11 = 7,458.75/x
  3. Step 3: Cross multiply
    13,047.75x = 18,007.11 × 7,458.75
  4. Step 4: Simplify right side
    13,047.75x = 134,310,531.71
  5. Step 5: Solve for x
    x = 134,310,531.71/13,047.75
  6. Step 6: Final answer
    x = 10,293.77

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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.