Home / 30,853.76-42,578.46-18,107.12

Finding the Fourth Proportional to 30,853.76, 42,578.46 and 18,107.12

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Solution

The fourth proportional to 30,853.76, 42,578.46 and 18,107.12 is: 24,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,853.76 : 42,578.46 = 18,107.12 : x
  2. Step 2: Convert to fraction form
    30,853.76/42,578.46 = 18,107.12/x
  3. Step 3: Cross multiply
    30,853.76x = 42,578.46 × 18,107.12
  4. Step 4: Simplify right side
    30,853.76x = 770,973,284.64
  5. Step 5: Solve for x
    x = 770,973,284.64/30,853.76
  6. Step 6: Final answer
    x = 24,987.98

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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.