Home / 30,958.18-42,721.90-16,811.12

Finding the Fourth Proportional to 30,958.18, 42,721.90 and 16,811.12

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Solution

The fourth proportional to 30,958.18, 42,721.90 and 16,811.12 is: 23,199.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.18 : 42,721.90 = 16,811.12 : x
  2. Step 2: Convert to fraction form
    30,958.18/42,721.90 = 16,811.12/x
  3. Step 3: Cross multiply
    30,958.18x = 42,721.90 × 16,811.12
  4. Step 4: Simplify right side
    30,958.18x = 718,202,987.53
  5. Step 5: Solve for x
    x = 718,202,987.53/30,958.18
  6. Step 6: Final answer
    x = 23,199.13

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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.