Home / 30,998.23-42,778.43-18,899.41

Finding the Fourth Proportional to 30,998.23, 42,778.43 and 18,899.41

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Solution

The fourth proportional to 30,998.23, 42,778.43 and 18,899.41 is: 26,081.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998.23 : 42,778.43 = 18,899.41 : x
  2. Step 2: Convert to fraction form
    30,998.23/42,778.43 = 18,899.41/x
  3. Step 3: Cross multiply
    30,998.23x = 42,778.43 × 18,899.41
  4. Step 4: Simplify right side
    30,998.23x = 808,486,873.83
  5. Step 5: Solve for x
    x = 808,486,873.83/30,998.23
  6. Step 6: Final answer
    x = 26,081.72

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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.