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Finding the Fourth Proportional to 15,857.83, 21,882.99 and 8,783.74

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Solution

The fourth proportional to 15,857.83, 21,882.99 and 8,783.74 is: 12,121.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.83 : 21,882.99 = 8,783.74 : x
  2. Step 2: Convert to fraction form
    15,857.83/21,882.99 = 8,783.74/x
  3. Step 3: Cross multiply
    15,857.83x = 21,882.99 × 8,783.74
  4. Step 4: Simplify right side
    15,857.83x = 192,214,494.58
  5. Step 5: Solve for x
    x = 192,214,494.58/15,857.83
  6. Step 6: Final answer
    x = 12,121.11

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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.