Home / 21,472.20-29,629.80-12,520.58

Finding the Fourth Proportional to 21,472.20, 29,629.80 and 12,520.58

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Solution

The fourth proportional to 21,472.20, 29,629.80 and 12,520.58 is: 17,277.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,472.20 : 29,629.80 = 12,520.58 : x
  2. Step 2: Convert to fraction form
    21,472.20/29,629.80 = 12,520.58/x
  3. Step 3: Cross multiply
    21,472.20x = 29,629.80 × 12,520.58
  4. Step 4: Simplify right side
    21,472.20x = 370,982,133.14
  5. Step 5: Solve for x
    x = 370,982,133.14/21,472.20
  6. Step 6: Final answer
    x = 17,277.32

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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.