Home / 30,950.18-42,721.41-18,202.80

Finding the Fourth Proportional to 30,950.18, 42,721.41 and 18,202.80

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Solution

The fourth proportional to 30,950.18, 42,721.41 and 18,202.80 is: 25,125.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,950.18 : 42,721.41 = 18,202.80 : x
  2. Step 2: Convert to fraction form
    30,950.18/42,721.41 = 18,202.80/x
  3. Step 3: Cross multiply
    30,950.18x = 42,721.41 × 18,202.80
  4. Step 4: Simplify right side
    30,950.18x = 777,649,281.95
  5. Step 5: Solve for x
    x = 777,649,281.95/30,950.18
  6. Step 6: Final answer
    x = 25,125.84

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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.