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Finding the Fourth Proportional to 7,275.94, 10,915.22 and 4,812.80

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Solution

The fourth proportional to 7,275.94, 10,915.22 and 4,812.80 is: 7,220.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,275.94 : 10,915.22 = 4,812.80 : x
  2. Step 2: Convert to fraction form
    7,275.94/10,915.22 = 4,812.80/x
  3. Step 3: Cross multiply
    7,275.94x = 10,915.22 × 4,812.80
  4. Step 4: Simplify right side
    7,275.94x = 52,532,728.27
  5. Step 5: Solve for x
    x = 52,532,728.27/7,275.94
  6. Step 6: Final answer
    x = 7,220.06

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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.