Home / 9,215.85-12,717.75-5,439

Finding the Fourth Proportional to 9,215.85, 12,717.75 and 5,439

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Solution

The fourth proportional to 9,215.85, 12,717.75 and 5,439 is: 7,505.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,215.85 : 12,717.75 = 5,439 : x
  2. Step 2: Convert to fraction form
    9,215.85/12,717.75 = 5,439/x
  3. Step 3: Cross multiply
    9,215.85x = 12,717.75 × 5,439
  4. Step 4: Simplify right side
    9,215.85x = 69,171,842.25
  5. Step 5: Solve for x
    x = 69,171,842.25/9,215.85
  6. Step 6: Final answer
    x = 7,505.75

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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.