Home / 7,118.81-9,824.39-3,975.20

Finding the Fourth Proportional to 7,118.81, 9,824.39 and 3,975.20

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Solution

The fourth proportional to 7,118.81, 9,824.39 and 3,975.20 is: 5,486.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,118.81 : 9,824.39 = 3,975.20 : x
  2. Step 2: Convert to fraction form
    7,118.81/9,824.39 = 3,975.20/x
  3. Step 3: Cross multiply
    7,118.81x = 9,824.39 × 3,975.20
  4. Step 4: Simplify right side
    7,118.81x = 39,053,846.13
  5. Step 5: Solve for x
    x = 39,053,846.13/7,118.81
  6. Step 6: Final answer
    x = 5,486.01

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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.