Home / 30,747.52-42,424.04-20,518.44

Finding the Fourth Proportional to 30,747.52, 42,424.04 and 20,518.44

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Solution

The fourth proportional to 30,747.52, 42,424.04 and 20,518.44 is: 28,310.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,747.52 : 42,424.04 = 20,518.44 : x
  2. Step 2: Convert to fraction form
    30,747.52/42,424.04 = 20,518.44/x
  3. Step 3: Cross multiply
    30,747.52x = 42,424.04 × 20,518.44
  4. Step 4: Simplify right side
    30,747.52x = 870,475,119.30
  5. Step 5: Solve for x
    x = 870,475,119.30/30,747.52
  6. Step 6: Final answer
    x = 28,310.42

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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.