Home / 13,907.91-20,860.65-5,142.90

Finding the Fourth Proportional to 13,907.91, 20,860.65 and 5,142.90

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Solution

The fourth proportional to 13,907.91, 20,860.65 and 5,142.90 is: 7,713.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,907.91 : 20,860.65 = 5,142.90 : x
  2. Step 2: Convert to fraction form
    13,907.91/20,860.65 = 5,142.90/x
  3. Step 3: Cross multiply
    13,907.91x = 20,860.65 × 5,142.90
  4. Step 4: Simplify right side
    13,907.91x = 107,284,236.89
  5. Step 5: Solve for x
    x = 107,284,236.89/13,907.91
  6. Step 6: Final answer
    x = 7,713.90

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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.