Home / 30,868.94-42,599.34-16,721.78

Finding the Fourth Proportional to 30,868.94, 42,599.34 and 16,721.78

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Solution

The fourth proportional to 30,868.94, 42,599.34 and 16,721.78 is: 23,076.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,868.94 : 42,599.34 = 16,721.78 : x
  2. Step 2: Convert to fraction form
    30,868.94/42,599.34 = 16,721.78/x
  3. Step 3: Cross multiply
    30,868.94x = 42,599.34 × 16,721.78
  4. Step 4: Simplify right side
    30,868.94x = 712,336,898.12
  5. Step 5: Solve for x
    x = 712,336,898.12/30,868.94
  6. Step 6: Final answer
    x = 23,076.17

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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.