Home / 5,107.45-7,661.65-1,987.69

Finding the Fourth Proportional to 5,107.45, 7,661.65 and 1,987.69

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Solution

The fourth proportional to 5,107.45, 7,661.65 and 1,987.69 is: 2,981.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,107.45 : 7,661.65 = 1,987.69 : x
  2. Step 2: Convert to fraction form
    5,107.45/7,661.65 = 1,987.69/x
  3. Step 3: Cross multiply
    5,107.45x = 7,661.65 × 1,987.69
  4. Step 4: Simplify right side
    5,107.45x = 15,228,985.09
  5. Step 5: Solve for x
    x = 15,228,985.09/5,107.45
  6. Step 6: Final answer
    x = 2,981.72

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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.