Home / 21,228.35-29,295.68-12,731.84

Finding the Fourth Proportional to 21,228.35, 29,295.68 and 12,731.84

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Solution

The fourth proportional to 21,228.35, 29,295.68 and 12,731.84 is: 17,570.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.35 : 29,295.68 = 12,731.84 : x
  2. Step 2: Convert to fraction form
    21,228.35/29,295.68 = 12,731.84/x
  3. Step 3: Cross multiply
    21,228.35x = 29,295.68 × 12,731.84
  4. Step 4: Simplify right side
    21,228.35x = 372,987,846.79
  5. Step 5: Solve for x
    x = 372,987,846.79/21,228.35
  6. Step 6: Final answer
    x = 17,570.27

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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.