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Finding the Fourth Proportional to 5,076.70, 7,007.20 and 3,087.90

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Solution

The fourth proportional to 5,076.70, 7,007.20 and 3,087.90 is: 4,262.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,076.70 : 7,007.20 = 3,087.90 : x
  2. Step 2: Convert to fraction form
    5,076.70/7,007.20 = 3,087.90/x
  3. Step 3: Cross multiply
    5,076.70x = 7,007.20 × 3,087.90
  4. Step 4: Simplify right side
    5,076.70x = 21,637,525.16
  5. Step 5: Solve for x
    x = 21,637,525.16/5,076.70
  6. Step 6: Final answer
    x = 4,262.13

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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.