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Finding the Fourth Proportional to 8,130.47, 12,216.22 and 7,802.42

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Solution

The fourth proportional to 8,130.47, 12,216.22 and 7,802.42 is: 11,723.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.47 : 12,216.22 = 7,802.42 : x
  2. Step 2: Convert to fraction form
    8,130.47/12,216.22 = 7,802.42/x
  3. Step 3: Cross multiply
    8,130.47x = 12,216.22 × 7,802.42
  4. Step 4: Simplify right side
    8,130.47x = 95,315,998.67
  5. Step 5: Solve for x
    x = 95,315,998.67/8,130.47
  6. Step 6: Final answer
    x = 11,723.31

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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.