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Finding the Fourth Proportional to 12,710.64, 19,065.96 and 6,865.92

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Solution

The fourth proportional to 12,710.64, 19,065.96 and 6,865.92 is: 10,298.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,710.64 : 19,065.96 = 6,865.92 : x
  2. Step 2: Convert to fraction form
    12,710.64/19,065.96 = 6,865.92/x
  3. Step 3: Cross multiply
    12,710.64x = 19,065.96 × 6,865.92
  4. Step 4: Simplify right side
    12,710.64x = 130,905,356.08
  5. Step 5: Solve for x
    x = 130,905,356.08/12,710.64
  6. Step 6: Final answer
    x = 10,298.88

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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.