Home / 30,998.88-42,778.60-16,851.68

Finding the Fourth Proportional to 30,998.88, 42,778.60 and 16,851.68

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Solution

The fourth proportional to 30,998.88, 42,778.60 and 16,851.68 is: 23,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,998.88 : 42,778.60 = 16,851.68 : x
  2. Step 2: Convert to fraction form
    30,998.88/42,778.60 = 16,851.68/x
  3. Step 3: Cross multiply
    30,998.88x = 42,778.60 × 16,851.68
  4. Step 4: Simplify right side
    30,998.88x = 720,891,278.05
  5. Step 5: Solve for x
    x = 720,891,278.05/30,998.88
  6. Step 6: Final answer
    x = 23,255.40

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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.