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Finding the Fourth Proportional to 7,681.68, 11,521.86 and 2,135.22

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Solution

The fourth proportional to 7,681.68, 11,521.86 and 2,135.22 is: 3,202.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,681.68 : 11,521.86 = 2,135.22 : x
  2. Step 2: Convert to fraction form
    7,681.68/11,521.86 = 2,135.22/x
  3. Step 3: Cross multiply
    7,681.68x = 11,521.86 × 2,135.22
  4. Step 4: Simplify right side
    7,681.68x = 24,601,705.91
  5. Step 5: Solve for x
    x = 24,601,705.91/7,681.68
  6. Step 6: Final answer
    x = 3,202.65

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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.