Home / 21,040.88-31,561.38-7,899.44

Finding the Fourth Proportional to 21,040.88, 31,561.38 and 7,899.44

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Solution

The fourth proportional to 21,040.88, 31,561.38 and 7,899.44 is: 11,849.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,040.88 : 31,561.38 = 7,899.44 : x
  2. Step 2: Convert to fraction form
    21,040.88/31,561.38 = 7,899.44/x
  3. Step 3: Cross multiply
    21,040.88x = 31,561.38 × 7,899.44
  4. Step 4: Simplify right side
    21,040.88x = 249,317,069.82
  5. Step 5: Solve for x
    x = 249,317,069.82/21,040.88
  6. Step 6: Final answer
    x = 11,849.18

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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.