Home / 30,811.75-42,519.42-17,381.95

Finding the Fourth Proportional to 30,811.75, 42,519.42 and 17,381.95

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Solution

The fourth proportional to 30,811.75, 42,519.42 and 17,381.95 is: 23,986.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,811.75 : 42,519.42 = 17,381.95 : x
  2. Step 2: Convert to fraction form
    30,811.75/42,519.42 = 17,381.95/x
  3. Step 3: Cross multiply
    30,811.75x = 42,519.42 × 17,381.95
  4. Step 4: Simplify right side
    30,811.75x = 739,070,326.17
  5. Step 5: Solve for x
    x = 739,070,326.17/30,811.75
  6. Step 6: Final answer
    x = 23,986.64

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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.