Home / 21,114.75-31,672.13-7,964.05

Finding the Fourth Proportional to 21,114.75, 31,672.13 and 7,964.05

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Solution

The fourth proportional to 21,114.75, 31,672.13 and 7,964.05 is: 11,946.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.75 : 31,672.13 = 7,964.05 : x
  2. Step 2: Convert to fraction form
    21,114.75/31,672.13 = 7,964.05/x
  3. Step 3: Cross multiply
    21,114.75x = 31,672.13 × 7,964.05
  4. Step 4: Simplify right side
    21,114.75x = 252,238,307.93
  5. Step 5: Solve for x
    x = 252,238,307.93/21,114.75
  6. Step 6: Final answer
    x = 11,946.07

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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.