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Finding the Fourth Proportional to 9,015.75, 12,441.75 and 5,478.30

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Solution

The fourth proportional to 9,015.75, 12,441.75 and 5,478.30 is: 7,560.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,015.75 : 12,441.75 = 5,478.30 : x
  2. Step 2: Convert to fraction form
    9,015.75/12,441.75 = 5,478.30/x
  3. Step 3: Cross multiply
    9,015.75x = 12,441.75 × 5,478.30
  4. Step 4: Simplify right side
    9,015.75x = 68,159,639.03
  5. Step 5: Solve for x
    x = 68,159,639.03/9,015.75
  6. Step 6: Final answer
    x = 7,560.06

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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.