Home / 13,287.21-18,335.68-7,318.75

Finding the Fourth Proportional to 13,287.21, 18,335.68 and 7,318.75

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Solution

The fourth proportional to 13,287.21, 18,335.68 and 7,318.75 is: 10,099.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,287.21 : 18,335.68 = 7,318.75 : x
  2. Step 2: Convert to fraction form
    13,287.21/18,335.68 = 7,318.75/x
  3. Step 3: Cross multiply
    13,287.21x = 18,335.68 × 7,318.75
  4. Step 4: Simplify right side
    13,287.21x = 134,194,193.86
  5. Step 5: Solve for x
    x = 134,194,193.86/13,287.21
  6. Step 6: Final answer
    x = 10,099.50

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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.