Home / 8,645.21-11,929.50-4,867.78

Finding the Fourth Proportional to 8,645.21, 11,929.50 and 4,867.78

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Solution

The fourth proportional to 8,645.21, 11,929.50 and 4,867.78 is: 6,717.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.21 : 11,929.50 = 4,867.78 : x
  2. Step 2: Convert to fraction form
    8,645.21/11,929.50 = 4,867.78/x
  3. Step 3: Cross multiply
    8,645.21x = 11,929.50 × 4,867.78
  4. Step 4: Simplify right side
    8,645.21x = 58,070,121.86
  5. Step 5: Solve for x
    x = 58,070,121.86/8,645.21
  6. Step 6: Final answer
    x = 6,717.03

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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.