Home / 30,579.60-42,181.90-19,231.12

Finding the Fourth Proportional to 30,579.60, 42,181.90 and 19,231.12

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Solution

The fourth proportional to 30,579.60, 42,181.90 and 19,231.12 is: 26,527.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.60 : 42,181.90 = 19,231.12 : x
  2. Step 2: Convert to fraction form
    30,579.60/42,181.90 = 19,231.12/x
  3. Step 3: Cross multiply
    30,579.60x = 42,181.90 × 19,231.12
  4. Step 4: Simplify right side
    30,579.60x = 811,205,180.73
  5. Step 5: Solve for x
    x = 811,205,180.73/30,579.60
  6. Step 6: Final answer
    x = 26,527.66

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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.