Home / 21,116.11-29,018.24-20,140.35

Finding the Fourth Proportional to 21,116.11, 29,018.24 and 20,140.35

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Solution

The fourth proportional to 21,116.11, 29,018.24 and 20,140.35 is: 27,677.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,116.11 : 29,018.24 = 20,140.35 : x
  2. Step 2: Convert to fraction form
    21,116.11/29,018.24 = 20,140.35/x
  3. Step 3: Cross multiply
    21,116.11x = 29,018.24 × 20,140.35
  4. Step 4: Simplify right side
    21,116.11x = 584,437,409.28
  5. Step 5: Solve for x
    x = 584,437,409.28/21,116.11
  6. Step 6: Final answer
    x = 27,677.32

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