Home / 30,385.15-41,920.42-18,899.30

Finding the Fourth Proportional to 30,385.15, 41,920.42 and 18,899.30

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Solution

The fourth proportional to 30,385.15, 41,920.42 and 18,899.30 is: 26,074.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,385.15 : 41,920.42 = 18,899.30 : x
  2. Step 2: Convert to fraction form
    30,385.15/41,920.42 = 18,899.30/x
  3. Step 3: Cross multiply
    30,385.15x = 41,920.42 × 18,899.30
  4. Step 4: Simplify right side
    30,385.15x = 792,266,593.71
  5. Step 5: Solve for x
    x = 792,266,593.71/30,385.15
  6. Step 6: Final answer
    x = 26,074.14

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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.