Home / 3,989.99-5,505.34-2,417.78

Finding the Fourth Proportional to 3,989.99, 5,505.34 and 2,417.78

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Solution

The fourth proportional to 3,989.99, 5,505.34 and 2,417.78 is: 3,336.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,989.99 : 5,505.34 = 2,417.78 : x
  2. Step 2: Convert to fraction form
    3,989.99/5,505.34 = 2,417.78/x
  3. Step 3: Cross multiply
    3,989.99x = 5,505.34 × 2,417.78
  4. Step 4: Simplify right side
    3,989.99x = 13,310,700.95
  5. Step 5: Solve for x
    x = 13,310,700.95/3,989.99
  6. Step 6: Final answer
    x = 3,336.02

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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.