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Finding the Fourth Proportional to 7,185.68, 9,915.80 and 4,353.76

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Solution

The fourth proportional to 7,185.68, 9,915.80 and 4,353.76 is: 6,007.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.68 : 9,915.80 = 4,353.76 : x
  2. Step 2: Convert to fraction form
    7,185.68/9,915.80 = 4,353.76/x
  3. Step 3: Cross multiply
    7,185.68x = 9,915.80 × 4,353.76
  4. Step 4: Simplify right side
    7,185.68x = 43,171,013.41
  5. Step 5: Solve for x
    x = 43,171,013.41/7,185.68
  6. Step 6: Final answer
    x = 6,007.92

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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.