Home / 6,140.20-9,210.30-5,459.80

Finding the Fourth Proportional to 6,140.20, 9,210.30 and 5,459.80

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Solution

The fourth proportional to 6,140.20, 9,210.30 and 5,459.80 is: 8,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,140.20 : 9,210.30 = 5,459.80 : x
  2. Step 2: Convert to fraction form
    6,140.20/9,210.30 = 5,459.80/x
  3. Step 3: Cross multiply
    6,140.20x = 9,210.30 × 5,459.80
  4. Step 4: Simplify right side
    6,140.20x = 50,286,395.94
  5. Step 5: Solve for x
    x = 50,286,395.94/6,140.20
  6. Step 6: Final answer
    x = 8,189.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.