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Finding the Fourth Proportional to 7,888.86, 11,835.18 and 5,424.84

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Solution

The fourth proportional to 7,888.86, 11,835.18 and 5,424.84 is: 8,138.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,888.86 : 11,835.18 = 5,424.84 : x
  2. Step 2: Convert to fraction form
    7,888.86/11,835.18 = 5,424.84/x
  3. Step 3: Cross multiply
    7,888.86x = 11,835.18 × 5,424.84
  4. Step 4: Simplify right side
    7,888.86x = 64,203,957.87
  5. Step 5: Solve for x
    x = 64,203,957.87/7,888.86
  6. Step 6: Final answer
    x = 8,138.56

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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.