Home / 21,981.18-32,964.39-7,186.64

Finding the Fourth Proportional to 21,981.18, 32,964.39 and 7,186.64

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Solution

The fourth proportional to 21,981.18, 32,964.39 and 7,186.64 is: 10,777.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.18 : 32,964.39 = 7,186.64 : x
  2. Step 2: Convert to fraction form
    21,981.18/32,964.39 = 7,186.64/x
  3. Step 3: Cross multiply
    21,981.18x = 32,964.39 × 7,186.64
  4. Step 4: Simplify right side
    21,981.18x = 236,903,038.93
  5. Step 5: Solve for x
    x = 236,903,038.93/21,981.18
  6. Step 6: Final answer
    x = 10,777.54

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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.