Home / 30,969.24-42,737.64-16,821.78

Finding the Fourth Proportional to 30,969.24, 42,737.64 and 16,821.78

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Solution

The fourth proportional to 30,969.24, 42,737.64 and 16,821.78 is: 23,214.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,969.24 : 42,737.64 = 16,821.78 : x
  2. Step 2: Convert to fraction form
    30,969.24/42,737.64 = 16,821.78/x
  3. Step 3: Cross multiply
    30,969.24x = 42,737.64 × 16,821.78
  4. Step 4: Simplify right side
    30,969.24x = 718,923,177.80
  5. Step 5: Solve for x
    x = 718,923,177.80/30,969.24
  6. Step 6: Final answer
    x = 23,214.10

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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.