Home / 8,130.20-11,217.40-5,147.30

Finding the Fourth Proportional to 8,130.20, 11,217.40 and 5,147.30

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Solution

The fourth proportional to 8,130.20, 11,217.40 and 5,147.30 is: 7,101.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,130.20 : 11,217.40 = 5,147.30 : x
  2. Step 2: Convert to fraction form
    8,130.20/11,217.40 = 5,147.30/x
  3. Step 3: Cross multiply
    8,130.20x = 11,217.40 × 5,147.30
  4. Step 4: Simplify right side
    8,130.20x = 57,739,323.02
  5. Step 5: Solve for x
    x = 57,739,323.02/8,130.20
  6. Step 6: Final answer
    x = 7,101.83

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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.