Home / 21,316.38-31,977.30-11,442.12

Finding the Fourth Proportional to 21,316.38, 31,977.30 and 11,442.12

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Solution

The fourth proportional to 21,316.38, 31,977.30 and 11,442.12 is: 17,164.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.38 : 31,977.30 = 11,442.12 : x
  2. Step 2: Convert to fraction form
    21,316.38/31,977.30 = 11,442.12/x
  3. Step 3: Cross multiply
    21,316.38x = 31,977.30 × 11,442.12
  4. Step 4: Simplify right side
    21,316.38x = 365,888,103.88
  5. Step 5: Solve for x
    x = 365,888,103.88/21,316.38
  6. Step 6: Final answer
    x = 17,164.65

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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.