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Finding the Fourth Proportional to 7,312.60, 10,969.80 and 2,631.88

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Solution

The fourth proportional to 7,312.60, 10,969.80 and 2,631.88 is: 3,948.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,312.60 : 10,969.80 = 2,631.88 : x
  2. Step 2: Convert to fraction form
    7,312.60/10,969.80 = 2,631.88/x
  3. Step 3: Cross multiply
    7,312.60x = 10,969.80 × 2,631.88
  4. Step 4: Simplify right side
    7,312.60x = 28,871,197.22
  5. Step 5: Solve for x
    x = 28,871,197.22/7,312.60
  6. Step 6: Final answer
    x = 3,948.14

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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.