Home / 30,579.87-42,183.12-19,245.15

Finding the Fourth Proportional to 30,579.87, 42,183.12 and 19,245.15

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Solution

The fourth proportional to 30,579.87, 42,183.12 and 19,245.15 is: 26,547.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,579.87 : 42,183.12 = 19,245.15 : x
  2. Step 2: Convert to fraction form
    30,579.87/42,183.12 = 19,245.15/x
  3. Step 3: Cross multiply
    30,579.87x = 42,183.12 × 19,245.15
  4. Step 4: Simplify right side
    30,579.87x = 811,820,471.87
  5. Step 5: Solve for x
    x = 811,820,471.87/30,579.87
  6. Step 6: Final answer
    x = 26,547.54

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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.