Home / 21,116.88-31,675.32-9,438.24

Finding the Fourth Proportional to 21,116.88, 31,675.32 and 9,438.24

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Solution

The fourth proportional to 21,116.88, 31,675.32 and 9,438.24 is: 14,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.88 : 31,675.32 = 9,438.24 : x
  2. Step 2: Convert to fraction form
    21,116.88/31,675.32 = 9,438.24/x
  3. Step 3: Cross multiply
    21,116.88x = 31,675.32 × 9,438.24
  4. Step 4: Simplify right side
    21,116.88x = 298,959,272.24
  5. Step 5: Solve for x
    x = 298,959,272.24/21,116.88
  6. Step 6: Final answer
    x = 14,157.36

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Double scale
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Similar ratio
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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.