Home / 30,351.60-41,920.20-20,263.50

Finding the Fourth Proportional to 30,351.60, 41,920.20 and 20,263.50

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Solution

The fourth proportional to 30,351.60, 41,920.20 and 20,263.50 is: 27,986.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,351.60 : 41,920.20 = 20,263.50 : x
  2. Step 2: Convert to fraction form
    30,351.60/41,920.20 = 20,263.50/x
  3. Step 3: Cross multiply
    30,351.60x = 41,920.20 × 20,263.50
  4. Step 4: Simplify right side
    30,351.60x = 849,449,972.70
  5. Step 5: Solve for x
    x = 849,449,972.70/30,351.60
  6. Step 6: Final answer
    x = 27,986.99

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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.