Home / 5,247.21-7,240.89-2,888.91

Finding the Fourth Proportional to 5,247.21, 7,240.89 and 2,888.91

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Solution

The fourth proportional to 5,247.21, 7,240.89 and 2,888.91 is: 3,986.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,247.21 : 7,240.89 = 2,888.91 : x
  2. Step 2: Convert to fraction form
    5,247.21/7,240.89 = 2,888.91/x
  3. Step 3: Cross multiply
    5,247.21x = 7,240.89 × 2,888.91
  4. Step 4: Simplify right side
    5,247.21x = 20,918,279.53
  5. Step 5: Solve for x
    x = 20,918,279.53/5,247.21
  6. Step 6: Final answer
    x = 3,986.55

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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.