Home / 30,778.94-42,471.87-18,845.66

Finding the Fourth Proportional to 30,778.94, 42,471.87 and 18,845.66

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Solution

The fourth proportional to 30,778.94, 42,471.87 and 18,845.66 is: 26,005.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,778.94 : 42,471.87 = 18,845.66 : x
  2. Step 2: Convert to fraction form
    30,778.94/42,471.87 = 18,845.66/x
  3. Step 3: Cross multiply
    30,778.94x = 42,471.87 × 18,845.66
  4. Step 4: Simplify right side
    30,778.94x = 800,410,421.58
  5. Step 5: Solve for x
    x = 800,410,421.58/30,778.94
  6. Step 6: Final answer
    x = 26,005.13

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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.