Home / 5,119.70-7,065.09-3,130.11

Finding the Fourth Proportional to 5,119.70, 7,065.09 and 3,130.11

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Solution

The fourth proportional to 5,119.70, 7,065.09 and 3,130.11 is: 4,319.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.70 : 7,065.09 = 3,130.11 : x
  2. Step 2: Convert to fraction form
    5,119.70/7,065.09 = 3,130.11/x
  3. Step 3: Cross multiply
    5,119.70x = 7,065.09 × 3,130.11
  4. Step 4: Simplify right side
    5,119.70x = 22,114,508.86
  5. Step 5: Solve for x
    x = 22,114,508.86/5,119.70
  6. Step 6: Final answer
    x = 4,319.50

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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.