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Finding the Fourth Proportional to 12,618.53, 17,412.85 and 7,239.83

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Solution

The fourth proportional to 12,618.53, 17,412.85 and 7,239.83 is: 9,990.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,618.53 : 17,412.85 = 7,239.83 : x
  2. Step 2: Convert to fraction form
    12,618.53/17,412.85 = 7,239.83/x
  3. Step 3: Cross multiply
    12,618.53x = 17,412.85 × 7,239.83
  4. Step 4: Simplify right side
    12,618.53x = 126,065,968.65
  5. Step 5: Solve for x
    x = 126,065,968.65/12,618.53
  6. Step 6: Final answer
    x = 9,990.55

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1.5x scale

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.