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Finding the Fourth Proportional to 21,902.76, 32,855.39 and 7,112.93

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Solution

The fourth proportional to 21,902.76, 32,855.39 and 7,112.93 is: 10,669.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.76 : 32,855.39 = 7,112.93 : x
  2. Step 2: Convert to fraction form
    21,902.76/32,855.39 = 7,112.93/x
  3. Step 3: Cross multiply
    21,902.76x = 32,855.39 × 7,112.93
  4. Step 4: Simplify right side
    21,902.76x = 233,697,889.35
  5. Step 5: Solve for x
    x = 233,697,889.35/21,902.76
  6. Step 6: Final answer
    x = 10,669.79

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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.