Home / 30,982.65-42,756.21-18,236.31

Finding the Fourth Proportional to 30,982.65, 42,756.21 and 18,236.31

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Solution

The fourth proportional to 30,982.65, 42,756.21 and 18,236.31 is: 25,166.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,982.65 : 42,756.21 = 18,236.31 : x
  2. Step 2: Convert to fraction form
    30,982.65/42,756.21 = 18,236.31/x
  3. Step 3: Cross multiply
    30,982.65x = 42,756.21 × 18,236.31
  4. Step 4: Simplify right side
    30,982.65x = 779,715,499.99
  5. Step 5: Solve for x
    x = 779,715,499.99/30,982.65
  6. Step 6: Final answer
    x = 25,166.20

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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.