Home / 9,355.46-12,912.75-5,378.88

Finding the Fourth Proportional to 9,355.46, 12,912.75 and 5,378.88

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Solution

The fourth proportional to 9,355.46, 12,912.75 and 5,378.88 is: 7,424.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,355.46 : 12,912.75 = 5,378.88 : x
  2. Step 2: Convert to fraction form
    9,355.46/12,912.75 = 5,378.88/x
  3. Step 3: Cross multiply
    9,355.46x = 12,912.75 × 5,378.88
  4. Step 4: Simplify right side
    9,355.46x = 69,456,151.55
  5. Step 5: Solve for x
    x = 69,456,151.55/9,355.46
  6. Step 6: Final answer
    x = 7,424.13

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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.