Home / 15,851.76-21,876.68-8,778.84

Finding the Fourth Proportional to 15,851.76, 21,876.68 and 8,778.84

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Solution

The fourth proportional to 15,851.76, 21,876.68 and 8,778.84 is: 12,115.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,851.76 : 21,876.68 = 8,778.84 : x
  2. Step 2: Convert to fraction form
    15,851.76/21,876.68 = 8,778.84/x
  3. Step 3: Cross multiply
    15,851.76x = 21,876.68 × 8,778.84
  4. Step 4: Simplify right side
    15,851.76x = 192,051,873.45
  5. Step 5: Solve for x
    x = 192,051,873.45/15,851.76
  6. Step 6: Final answer
    x = 12,115.49

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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.