Home / 19,821.20-27,367.60-12,759.92

Finding the Fourth Proportional to 19,821.20, 27,367.60 and 12,759.92

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Solution

The fourth proportional to 19,821.20, 27,367.60 and 12,759.92 is: 17,617.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,821.20 : 27,367.60 = 12,759.92 : x
  2. Step 2: Convert to fraction form
    19,821.20/27,367.60 = 12,759.92/x
  3. Step 3: Cross multiply
    19,821.20x = 27,367.60 × 12,759.92
  4. Step 4: Simplify right side
    19,821.20x = 349,208,386.59
  5. Step 5: Solve for x
    x = 349,208,386.59/19,821.20
  6. Step 6: Final answer
    x = 17,617.93

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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.