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Finding the Fourth Proportional to 13,255.95, 18,293.54 and 7,287.74

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Solution

The fourth proportional to 13,255.95, 18,293.54 and 7,287.74 is: 10,057.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,255.95 : 18,293.54 = 7,287.74 : x
  2. Step 2: Convert to fraction form
    13,255.95/18,293.54 = 7,287.74/x
  3. Step 3: Cross multiply
    13,255.95x = 18,293.54 × 7,287.74
  4. Step 4: Simplify right side
    13,255.95x = 133,318,435.29
  5. Step 5: Solve for x
    x = 133,318,435.29/13,255.95
  6. Step 6: Final answer
    x = 10,057.25

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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.