Home / 30,986.42-42,761.25-18,239.99

Finding the Fourth Proportional to 30,986.42, 42,761.25 and 18,239.99

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Solution

The fourth proportional to 30,986.42, 42,761.25 and 18,239.99 is: 25,171.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,986.42 : 42,761.25 = 18,239.99 : x
  2. Step 2: Convert to fraction form
    30,986.42/42,761.25 = 18,239.99/x
  3. Step 3: Cross multiply
    30,986.42x = 42,761.25 × 18,239.99
  4. Step 4: Simplify right side
    30,986.42x = 779,964,558.58
  5. Step 5: Solve for x
    x = 779,964,558.58/30,986.42
  6. Step 6: Final answer
    x = 25,171.18

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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.