Home / 21,274.80-29,354.78-12,321.77

Finding the Fourth Proportional to 21,274.80, 29,354.78 and 12,321.77

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Solution

The fourth proportional to 21,274.80, 29,354.78 and 12,321.77 is: 17,001.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,274.80 : 29,354.78 = 12,321.77 : x
  2. Step 2: Convert to fraction form
    21,274.80/29,354.78 = 12,321.77/x
  3. Step 3: Cross multiply
    21,274.80x = 29,354.78 × 12,321.77
  4. Step 4: Simplify right side
    21,274.80x = 361,702,862.06
  5. Step 5: Solve for x
    x = 361,702,862.06/21,274.80
  6. Step 6: Final answer
    x = 17,001.47

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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.