Home / 21,071.71-29,080.47-12,122.02

Finding the Fourth Proportional to 21,071.71, 29,080.47 and 12,122.02

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Solution

The fourth proportional to 21,071.71, 29,080.47 and 12,122.02 is: 16,729.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.71 : 29,080.47 = 12,122.02 : x
  2. Step 2: Convert to fraction form
    21,071.71/29,080.47 = 12,122.02/x
  3. Step 3: Cross multiply
    21,071.71x = 29,080.47 × 12,122.02
  4. Step 4: Simplify right side
    21,071.71x = 352,514,038.95
  5. Step 5: Solve for x
    x = 352,514,038.95/21,071.71
  6. Step 6: Final answer
    x = 16,729.26

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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.