Home / 15,511.10-21,399.80-9,458.88

Finding the Fourth Proportional to 15,511.10, 21,399.80 and 9,458.88

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Solution

The fourth proportional to 15,511.10, 21,399.80 and 9,458.88 is: 13,049.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.10 : 21,399.80 = 9,458.88 : x
  2. Step 2: Convert to fraction form
    15,511.10/21,399.80 = 9,458.88/x
  3. Step 3: Cross multiply
    15,511.10x = 21,399.80 × 9,458.88
  4. Step 4: Simplify right side
    15,511.10x = 202,418,012.68
  5. Step 5: Solve for x
    x = 202,418,012.68/15,511.10
  6. Step 6: Final answer
    x = 13,049.89

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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.