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Finding the Fourth Proportional to 8,802.72, 12,122.15 and 8,239.91

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Solution

The fourth proportional to 8,802.72, 12,122.15 and 8,239.91 is: 11,347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,802.72 : 12,122.15 = 8,239.91 : x
  2. Step 2: Convert to fraction form
    8,802.72/12,122.15 = 8,239.91/x
  3. Step 3: Cross multiply
    8,802.72x = 12,122.15 × 8,239.91
  4. Step 4: Simplify right side
    8,802.72x = 99,885,425.01
  5. Step 5: Solve for x
    x = 99,885,425.01/8,802.72
  6. Step 6: Final answer
    x = 11,347.11

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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.