Home / 30,765.59-42,479.27-18,845.21

Finding the Fourth Proportional to 30,765.59, 42,479.27 and 18,845.21

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Solution

The fourth proportional to 30,765.59, 42,479.27 and 18,845.21 is: 26,020.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,765.59 : 42,479.27 = 18,845.21 : x
  2. Step 2: Convert to fraction form
    30,765.59/42,479.27 = 18,845.21/x
  3. Step 3: Cross multiply
    30,765.59x = 42,479.27 × 18,845.21
  4. Step 4: Simplify right side
    30,765.59x = 800,530,669.57
  5. Step 5: Solve for x
    x = 800,530,669.57/30,765.59
  6. Step 6: Final answer
    x = 26,020.33

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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.