Home / 5,428.60-7,488.48-3,189.40

Finding the Fourth Proportional to 5,428.60, 7,488.48 and 3,189.40

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Solution

The fourth proportional to 5,428.60, 7,488.48 and 3,189.40 is: 4,399.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428.60 : 7,488.48 = 3,189.40 : x
  2. Step 2: Convert to fraction form
    5,428.60/7,488.48 = 3,189.40/x
  3. Step 3: Cross multiply
    5,428.60x = 7,488.48 × 3,189.40
  4. Step 4: Simplify right side
    5,428.60x = 23,883,758.11
  5. Step 5: Solve for x
    x = 23,883,758.11/5,428.60
  6. Step 6: Final answer
    x = 4,399.62

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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.