Home / 19,215.20-26,517.84-12,830.60

Finding the Fourth Proportional to 19,215.20, 26,517.84 and 12,830.60

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Solution

The fourth proportional to 19,215.20, 26,517.84 and 12,830.60 is: 17,706.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,215.20 : 26,517.84 = 12,830.60 : x
  2. Step 2: Convert to fraction form
    19,215.20/26,517.84 = 12,830.60/x
  3. Step 3: Cross multiply
    19,215.20x = 26,517.84 × 12,830.60
  4. Step 4: Simplify right side
    19,215.20x = 340,239,797.90
  5. Step 5: Solve for x
    x = 340,239,797.90/19,215.20
  6. Step 6: Final answer
    x = 17,706.80

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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.