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Finding the Fourth Proportional to 8,802.47, 12,121.80 and 8,239.65

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Solution

The fourth proportional to 8,802.47, 12,121.80 and 8,239.65 is: 11,346.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,802.47 : 12,121.80 = 8,239.65 : x
  2. Step 2: Convert to fraction form
    8,802.47/12,121.80 = 8,239.65/x
  3. Step 3: Cross multiply
    8,802.47x = 12,121.80 × 8,239.65
  4. Step 4: Simplify right side
    8,802.47x = 99,879,389.37
  5. Step 5: Solve for x
    x = 99,879,389.37/8,802.47
  6. Step 6: Final answer
    x = 11,346.75

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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.