Home / 30,919.78-42,669.31-17,490.75

Finding the Fourth Proportional to 30,919.78, 42,669.31 and 17,490.75

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Solution

The fourth proportional to 30,919.78, 42,669.31 and 17,490.75 is: 24,137.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.78 : 42,669.31 = 17,490.75 : x
  2. Step 2: Convert to fraction form
    30,919.78/42,669.31 = 17,490.75/x
  3. Step 3: Cross multiply
    30,919.78x = 42,669.31 × 17,490.75
  4. Step 4: Simplify right side
    30,919.78x = 746,318,102.94
  5. Step 5: Solve for x
    x = 746,318,102.94/30,919.78
  6. Step 6: Final answer
    x = 24,137.24

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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.