Home / 30,994.15-42,782.90-18,418.75

Finding the Fourth Proportional to 30,994.15, 42,782.90 and 18,418.75

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Solution

The fourth proportional to 30,994.15, 42,782.90 and 18,418.75 is: 25,424.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,994.15 : 42,782.90 = 18,418.75 : x
  2. Step 2: Convert to fraction form
    30,994.15/42,782.90 = 18,418.75/x
  3. Step 3: Cross multiply
    30,994.15x = 42,782.90 × 18,418.75
  4. Step 4: Simplify right side
    30,994.15x = 788,007,447.28
  5. Step 5: Solve for x
    x = 788,007,447.28/30,994.15
  6. Step 6: Final answer
    x = 25,424.39

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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.