Home / 21,102.54-29,143.29-18,256.23

Finding the Fourth Proportional to 21,102.54, 29,143.29 and 18,256.23

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Solution

The fourth proportional to 21,102.54, 29,143.29 and 18,256.23 is: 25,212.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,102.54 : 29,143.29 = 18,256.23 : x
  2. Step 2: Convert to fraction form
    21,102.54/29,143.29 = 18,256.23/x
  3. Step 3: Cross multiply
    21,102.54x = 29,143.29 × 18,256.23
  4. Step 4: Simplify right side
    21,102.54x = 532,046,605.20
  5. Step 5: Solve for x
    x = 532,046,605.20/21,102.54
  6. Step 6: Final answer
    x = 25,212.44

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Half scale
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Double scale
Find fourth proportional to 21,103.54, 29,144.67 and 18,257.23
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.