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Finding the Fourth Proportional to 7,879.53, 11,775.75 and 7,424.31

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Solution

The fourth proportional to 7,879.53, 11,775.75 and 7,424.31 is: 11,095.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879.53 : 11,775.75 = 7,424.31 : x
  2. Step 2: Convert to fraction form
    7,879.53/11,775.75 = 7,424.31/x
  3. Step 3: Cross multiply
    7,879.53x = 11,775.75 × 7,424.31
  4. Step 4: Simplify right side
    7,879.53x = 87,426,818.48
  5. Step 5: Solve for x
    x = 87,426,818.48/7,879.53
  6. Step 6: Final answer
    x = 11,095.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.