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Finding the Fourth Proportional to 19,918.68, 29,870.68 and 6,767.52

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Solution

The fourth proportional to 19,918.68, 29,870.68 and 6,767.52 is: 10,148.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,918.68 : 29,870.68 = 6,767.52 : x
  2. Step 2: Convert to fraction form
    19,918.68/29,870.68 = 6,767.52/x
  3. Step 3: Cross multiply
    19,918.68x = 29,870.68 × 6,767.52
  4. Step 4: Simplify right side
    19,918.68x = 202,150,424.31
  5. Step 5: Solve for x
    x = 202,150,424.31/19,918.68
  6. Step 6: Final answer
    x = 10,148.79

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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.