Home / 5,118.76-7,064.28-2,880.50

Finding the Fourth Proportional to 5,118.76, 7,064.28 and 2,880.50

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Solution

The fourth proportional to 5,118.76, 7,064.28 and 2,880.50 is: 3,975.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,118.76 : 7,064.28 = 2,880.50 : x
  2. Step 2: Convert to fraction form
    5,118.76/7,064.28 = 2,880.50/x
  3. Step 3: Cross multiply
    5,118.76x = 7,064.28 × 2,880.50
  4. Step 4: Simplify right side
    5,118.76x = 20,348,658.54
  5. Step 5: Solve for x
    x = 20,348,658.54/5,118.76
  6. Step 6: Final answer
    x = 3,975.31

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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.