Home / 21,187.88-31,782.05-6,396.93

Finding the Fourth Proportional to 21,187.88, 31,782.05 and 6,396.93

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Solution

The fourth proportional to 21,187.88, 31,782.05 and 6,396.93 is: 9,595.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.88 : 31,782.05 = 6,396.93 : x
  2. Step 2: Convert to fraction form
    21,187.88/31,782.05 = 6,396.93/x
  3. Step 3: Cross multiply
    21,187.88x = 31,782.05 × 6,396.93
  4. Step 4: Simplify right side
    21,187.88x = 203,307,517.12
  5. Step 5: Solve for x
    x = 203,307,517.12/21,187.88
  6. Step 6: Final answer
    x = 9,595.47

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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.