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Finding the Fourth Proportional to 7,376.80, 11,065.20 and 4,903.60

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Solution

The fourth proportional to 7,376.80, 11,065.20 and 4,903.60 is: 7,355.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,376.80 : 11,065.20 = 4,903.60 : x
  2. Step 2: Convert to fraction form
    7,376.80/11,065.20 = 4,903.60/x
  3. Step 3: Cross multiply
    7,376.80x = 11,065.20 × 4,903.60
  4. Step 4: Simplify right side
    7,376.80x = 54,259,314.72
  5. Step 5: Solve for x
    x = 54,259,314.72/7,376.80
  6. Step 6: Final answer
    x = 7,355.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.