Home / 20,215.80-30,360.15-19,559.70

Finding the Fourth Proportional to 20,215.80, 30,360.15 and 19,559.70

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Solution

The fourth proportional to 20,215.80, 30,360.15 and 19,559.70 is: 29,374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.80 : 30,360.15 = 19,559.70 : x
  2. Step 2: Convert to fraction form
    20,215.80/30,360.15 = 19,559.70/x
  3. Step 3: Cross multiply
    20,215.80x = 30,360.15 × 19,559.70
  4. Step 4: Simplify right side
    20,215.80x = 593,835,425.96
  5. Step 5: Solve for x
    x = 593,835,425.96/20,215.80
  6. Step 6: Final answer
    x = 29,374.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.