Home / 21,651.48-29,899.68-20,472.09

Finding the Fourth Proportional to 21,651.48, 29,899.68 and 20,472.09

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Solution

The fourth proportional to 21,651.48, 29,899.68 and 20,472.09 is: 28,271.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,651.48 : 29,899.68 = 20,472.09 : x
  2. Step 2: Convert to fraction form
    21,651.48/29,899.68 = 20,472.09/x
  3. Step 3: Cross multiply
    21,651.48x = 29,899.68 × 20,472.09
  4. Step 4: Simplify right side
    21,651.48x = 612,108,939.93
  5. Step 5: Solve for x
    x = 612,108,939.93/21,651.48
  6. Step 6: Final answer
    x = 28,271.00

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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.