Home / 21,071.83-29,079.36-11,640.40

Finding the Fourth Proportional to 21,071.83, 29,079.36 and 11,640.40

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Solution

The fourth proportional to 21,071.83, 29,079.36 and 11,640.40 is: 16,063.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.83 : 29,079.36 = 11,640.40 : x
  2. Step 2: Convert to fraction form
    21,071.83/29,079.36 = 11,640.40/x
  3. Step 3: Cross multiply
    21,071.83x = 29,079.36 × 11,640.40
  4. Step 4: Simplify right side
    21,071.83x = 338,495,382.14
  5. Step 5: Solve for x
    x = 338,495,382.14/21,071.83
  6. Step 6: Final answer
    x = 16,063.88

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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.