Home / 21,153.30-29,132.37-20,694.12

Finding the Fourth Proportional to 21,153.30, 29,132.37 and 20,694.12

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Solution

The fourth proportional to 21,153.30, 29,132.37 and 20,694.12 is: 28,499.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,153.30 : 29,132.37 = 20,694.12 : x
  2. Step 2: Convert to fraction form
    21,153.30/29,132.37 = 20,694.12/x
  3. Step 3: Cross multiply
    21,153.30x = 29,132.37 × 20,694.12
  4. Step 4: Simplify right side
    21,153.30x = 602,868,760.66
  5. Step 5: Solve for x
    x = 602,868,760.66/21,153.30
  6. Step 6: Final answer
    x = 28,499.99

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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.