Home / 6,428.13-9,642.21-1,811.13

Finding the Fourth Proportional to 6,428.13, 9,642.21 and 1,811.13

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Solution

The fourth proportional to 6,428.13, 9,642.21 and 1,811.13 is: 2,716.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.13 : 9,642.21 = 1,811.13 : x
  2. Step 2: Convert to fraction form
    6,428.13/9,642.21 = 1,811.13/x
  3. Step 3: Cross multiply
    6,428.13x = 9,642.21 × 1,811.13
  4. Step 4: Simplify right side
    6,428.13x = 17,463,295.80
  5. Step 5: Solve for x
    x = 17,463,295.80/6,428.13
  6. Step 6: Final answer
    x = 2,716.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.