Home / 5,156.49-7,120.70-4,880.28

Finding the Fourth Proportional to 5,156.49, 7,120.70 and 4,880.28

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Solution

The fourth proportional to 5,156.49, 7,120.70 and 4,880.28 is: 6,739.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.49 : 7,120.70 = 4,880.28 : x
  2. Step 2: Convert to fraction form
    5,156.49/7,120.70 = 4,880.28/x
  3. Step 3: Cross multiply
    5,156.49x = 7,120.70 × 4,880.28
  4. Step 4: Simplify right side
    5,156.49x = 34,751,009.80
  5. Step 5: Solve for x
    x = 34,751,009.80/5,156.49
  6. Step 6: Final answer
    x = 6,739.28

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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.