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Finding the Fourth Proportional to 9,113.60, 13,659.60 and 4,728.80

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Solution

The fourth proportional to 9,113.60, 13,659.60 and 4,728.80 is: 7,087.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,113.60 : 13,659.60 = 4,728.80 : x
  2. Step 2: Convert to fraction form
    9,113.60/13,659.60 = 4,728.80/x
  3. Step 3: Cross multiply
    9,113.60x = 13,659.60 × 4,728.80
  4. Step 4: Simplify right side
    9,113.60x = 64,593,516.48
  5. Step 5: Solve for x
    x = 64,593,516.48/9,113.60
  6. Step 6: Final answer
    x = 7,087.60

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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.