Home / 8,987.08-13,486.79-3,143.70

Finding the Fourth Proportional to 8,987.08, 13,486.79 and 3,143.70

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Solution

The fourth proportional to 8,987.08, 13,486.79 and 3,143.70 is: 4,717.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.08 : 13,486.79 = 3,143.70 : x
  2. Step 2: Convert to fraction form
    8,987.08/13,486.79 = 3,143.70/x
  3. Step 3: Cross multiply
    8,987.08x = 13,486.79 × 3,143.70
  4. Step 4: Simplify right side
    8,987.08x = 42,398,421.72
  5. Step 5: Solve for x
    x = 42,398,421.72/8,987.08
  6. Step 6: Final answer
    x = 4,717.71

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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.