Home / 21,272.40-29,355.12-11,840.76

Finding the Fourth Proportional to 21,272.40, 29,355.12 and 11,840.76

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Solution

The fourth proportional to 21,272.40, 29,355.12 and 11,840.76 is: 16,339.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.40 : 29,355.12 = 11,840.76 : x
  2. Step 2: Convert to fraction form
    21,272.40/29,355.12 = 11,840.76/x
  3. Step 3: Cross multiply
    21,272.40x = 29,355.12 × 11,840.76
  4. Step 4: Simplify right side
    21,272.40x = 347,586,930.69
  5. Step 5: Solve for x
    x = 347,586,930.69/21,272.40
  6. Step 6: Final answer
    x = 16,339.81

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Double scale
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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.