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Finding the Fourth Proportional to 6,995.20, 10,485.76 and 4,915.20

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Solution

The fourth proportional to 6,995.20, 10,485.76 and 4,915.20 is: 7,367.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,995.20 : 10,485.76 = 4,915.20 : x
  2. Step 2: Convert to fraction form
    6,995.20/10,485.76 = 4,915.20/x
  3. Step 3: Cross multiply
    6,995.20x = 10,485.76 × 4,915.20
  4. Step 4: Simplify right side
    6,995.20x = 51,539,607.55
  5. Step 5: Solve for x
    x = 51,539,607.55/6,995.20
  6. Step 6: Final answer
    x = 7,367.85

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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.