Home / 21,071.53-29,078.76-11,640.70

Finding the Fourth Proportional to 21,071.53, 29,078.76 and 11,640.70

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Solution

The fourth proportional to 21,071.53, 29,078.76 and 11,640.70 is: 16,064.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.53 : 29,078.76 = 11,640.70 : x
  2. Step 2: Convert to fraction form
    21,071.53/29,078.76 = 11,640.70/x
  3. Step 3: Cross multiply
    21,071.53x = 29,078.76 × 11,640.70
  4. Step 4: Simplify right side
    21,071.53x = 338,497,121.53
  5. Step 5: Solve for x
    x = 338,497,121.53/21,071.53
  6. Step 6: Final answer
    x = 16,064.19

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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.