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Finding the Fourth Proportional to 5,459.80, 8,189.70 and 4,826.20

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Solution

The fourth proportional to 5,459.80, 8,189.70 and 4,826.20 is: 7,239.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,459.80 : 8,189.70 = 4,826.20 : x
  2. Step 2: Convert to fraction form
    5,459.80/8,189.70 = 4,826.20/x
  3. Step 3: Cross multiply
    5,459.80x = 8,189.70 × 4,826.20
  4. Step 4: Simplify right side
    5,459.80x = 39,525,130.14
  5. Step 5: Solve for x
    x = 39,525,130.14/5,459.80
  6. Step 6: Final answer
    x = 7,239.30

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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.