Home / 30,756.48-42,450.84-20,139.95

Finding the Fourth Proportional to 30,756.48, 42,450.84 and 20,139.95

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Solution

The fourth proportional to 30,756.48, 42,450.84 and 20,139.95 is: 27,797.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,756.48 : 42,450.84 = 20,139.95 : x
  2. Step 2: Convert to fraction form
    30,756.48/42,450.84 = 20,139.95/x
  3. Step 3: Cross multiply
    30,756.48x = 42,450.84 × 20,139.95
  4. Step 4: Simplify right side
    30,756.48x = 854,957,582.80
  5. Step 5: Solve for x
    x = 854,957,582.80/30,756.48
  6. Step 6: Final answer
    x = 27,797.64

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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.