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Finding the Fourth Proportional to 10,307, 15,458.16 and 2,912.20

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Solution

The fourth proportional to 10,307, 15,458.16 and 2,912.20 is: 4,367.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,307 : 15,458.16 = 2,912.20 : x
  2. Step 2: Convert to fraction form
    10,307/15,458.16 = 2,912.20/x
  3. Step 3: Cross multiply
    10,307x = 15,458.16 × 2,912.20
  4. Step 4: Simplify right side
    10,307x = 45,017,253.55
  5. Step 5: Solve for x
    x = 45,017,253.55/10,307
  6. Step 6: Final answer
    x = 4,367.64

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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.