Home / 5,140.14-7,720.72-3,387.65

Finding the Fourth Proportional to 5,140.14, 7,720.72 and 3,387.65

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Solution

The fourth proportional to 5,140.14, 7,720.72 and 3,387.65 is: 5,088.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,140.14 : 7,720.72 = 3,387.65 : x
  2. Step 2: Convert to fraction form
    5,140.14/7,720.72 = 3,387.65/x
  3. Step 3: Cross multiply
    5,140.14x = 7,720.72 × 3,387.65
  4. Step 4: Simplify right side
    5,140.14x = 26,155,097.11
  5. Step 5: Solve for x
    x = 26,155,097.11/5,140.14
  6. Step 6: Final answer
    x = 5,088.41

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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.