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Finding the Fourth Proportional to 12,488.65, 18,732.94 and 7,290.88

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Solution

The fourth proportional to 12,488.65, 18,732.94 and 7,290.88 is: 10,936.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.65 : 18,732.94 = 7,290.88 : x
  2. Step 2: Convert to fraction form
    12,488.65/18,732.94 = 7,290.88/x
  3. Step 3: Cross multiply
    12,488.65x = 18,732.94 × 7,290.88
  4. Step 4: Simplify right side
    12,488.65x = 136,579,552.53
  5. Step 5: Solve for x
    x = 136,579,552.53/12,488.65
  6. Step 6: Final answer
    x = 10,936.30

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1.5x scale

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.