Home / 5,281.14-7,287.90-2,891.07

Finding the Fourth Proportional to 5,281.14, 7,287.90 and 2,891.07

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Solution

The fourth proportional to 5,281.14, 7,287.90 and 2,891.07 is: 3,989.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.14 : 7,287.90 = 2,891.07 : x
  2. Step 2: Convert to fraction form
    5,281.14/7,287.90 = 2,891.07/x
  3. Step 3: Cross multiply
    5,281.14x = 7,287.90 × 2,891.07
  4. Step 4: Simplify right side
    5,281.14x = 21,069,829.05
  5. Step 5: Solve for x
    x = 21,069,829.05/5,281.14
  6. Step 6: Final answer
    x = 3,989.64

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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.