Home / 30,378.07-41,891.07-20,306.53

Finding the Fourth Proportional to 30,378.07, 41,891.07 and 20,306.53

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Solution

The fourth proportional to 30,378.07, 41,891.07 and 20,306.53 is: 28,002.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,378.07 : 41,891.07 = 20,306.53 : x
  2. Step 2: Convert to fraction form
    30,378.07/41,891.07 = 20,306.53/x
  3. Step 3: Cross multiply
    30,378.07x = 41,891.07 × 20,306.53
  4. Step 4: Simplify right side
    30,378.07x = 850,662,269.69
  5. Step 5: Solve for x
    x = 850,662,269.69/30,378.07
  6. Step 6: Final answer
    x = 28,002.51

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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.