Home / 21,442.58-29,580.88-13,891.42

Finding the Fourth Proportional to 21,442.58, 29,580.88 and 13,891.42

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Solution

The fourth proportional to 21,442.58, 29,580.88 and 13,891.42 is: 19,163.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,442.58 : 29,580.88 = 13,891.42 : x
  2. Step 2: Convert to fraction form
    21,442.58/29,580.88 = 13,891.42/x
  3. Step 3: Cross multiply
    21,442.58x = 29,580.88 × 13,891.42
  4. Step 4: Simplify right side
    21,442.58x = 410,920,428.05
  5. Step 5: Solve for x
    x = 410,920,428.05/21,442.58
  6. Step 6: Final answer
    x = 19,163.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.