Home / 21,813.15-30,098.52-12,859.41

Finding the Fourth Proportional to 21,813.15, 30,098.52 and 12,859.41

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Solution

The fourth proportional to 21,813.15, 30,098.52 and 12,859.41 is: 17,743.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,813.15 : 30,098.52 = 12,859.41 : x
  2. Step 2: Convert to fraction form
    21,813.15/30,098.52 = 12,859.41/x
  3. Step 3: Cross multiply
    21,813.15x = 30,098.52 × 12,859.41
  4. Step 4: Simplify right side
    21,813.15x = 387,049,209.07
  5. Step 5: Solve for x
    x = 387,049,209.07/21,813.15
  6. Step 6: Final answer
    x = 17,743.85

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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.