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Finding the Fourth Proportional to 8,808.64, 12,156 and 5,271.28

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Solution

The fourth proportional to 8,808.64, 12,156 and 5,271.28 is: 7,274.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,808.64 : 12,156 = 5,271.28 : x
  2. Step 2: Convert to fraction form
    8,808.64/12,156 = 5,271.28/x
  3. Step 3: Cross multiply
    8,808.64x = 12,156 × 5,271.28
  4. Step 4: Simplify right side
    8,808.64x = 64,077,679.68
  5. Step 5: Solve for x
    x = 64,077,679.68/8,808.64
  6. Step 6: Final answer
    x = 7,274.41

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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.