Home / 30,760.97-42,441.17-20,700.77

Finding the Fourth Proportional to 30,760.97, 42,441.17 and 20,700.77

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Solution

The fourth proportional to 30,760.97, 42,441.17 and 20,700.77 is: 28,561.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,760.97 : 42,441.17 = 20,700.77 : x
  2. Step 2: Convert to fraction form
    30,760.97/42,441.17 = 20,700.77/x
  3. Step 3: Cross multiply
    30,760.97x = 42,441.17 × 20,700.77
  4. Step 4: Simplify right side
    30,760.97x = 878,564,582.99
  5. Step 5: Solve for x
    x = 878,564,582.99/30,760.97
  6. Step 6: Final answer
    x = 28,561.02

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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.