Home / 21,715.12-29,940.60-18,352

Finding the Fourth Proportional to 21,715.12, 29,940.60 and 18,352

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Solution

The fourth proportional to 21,715.12, 29,940.60 and 18,352 is: 25,303.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,715.12 : 29,940.60 = 18,352 : x
  2. Step 2: Convert to fraction form
    21,715.12/29,940.60 = 18,352/x
  3. Step 3: Cross multiply
    21,715.12x = 29,940.60 × 18,352
  4. Step 4: Simplify right side
    21,715.12x = 549,469,891.20
  5. Step 5: Solve for x
    x = 549,469,891.20/21,715.12
  6. Step 6: Final answer
    x = 25,303.56

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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.