Home / 15,321.88-21,146.17-8,607.51

Finding the Fourth Proportional to 15,321.88, 21,146.17 and 8,607.51

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Solution

The fourth proportional to 15,321.88, 21,146.17 and 8,607.51 is: 11,879.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,321.88 : 21,146.17 = 8,607.51 : x
  2. Step 2: Convert to fraction form
    15,321.88/21,146.17 = 8,607.51/x
  3. Step 3: Cross multiply
    15,321.88x = 21,146.17 × 8,607.51
  4. Step 4: Simplify right side
    15,321.88x = 182,015,764.01
  5. Step 5: Solve for x
    x = 182,015,764.01/15,321.88
  6. Step 6: Final answer
    x = 11,879.47

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.