Home / 21,666.72-29,898-17,201.28

Finding the Fourth Proportional to 21,666.72, 29,898 and 17,201.28

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Solution

The fourth proportional to 21,666.72, 29,898 and 17,201.28 is: 23,736.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,666.72 : 29,898 = 17,201.28 : x
  2. Step 2: Convert to fraction form
    21,666.72/29,898 = 17,201.28/x
  3. Step 3: Cross multiply
    21,666.72x = 29,898 × 17,201.28
  4. Step 4: Simplify right side
    21,666.72x = 514,283,869.44
  5. Step 5: Solve for x
    x = 514,283,869.44/21,666.72
  6. Step 6: Final answer
    x = 23,736.12

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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.