Home / 15,857.28-21,882.72-8,783.64

Finding the Fourth Proportional to 15,857.28, 21,882.72 and 8,783.64

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Solution

The fourth proportional to 15,857.28, 21,882.72 and 8,783.64 is: 12,121.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,857.28 : 21,882.72 = 8,783.64 : x
  2. Step 2: Convert to fraction form
    15,857.28/21,882.72 = 8,783.64/x
  3. Step 3: Cross multiply
    15,857.28x = 21,882.72 × 8,783.64
  4. Step 4: Simplify right side
    15,857.28x = 192,209,934.70
  5. Step 5: Solve for x
    x = 192,209,934.70/15,857.28
  6. Step 6: Final answer
    x = 12,121.24

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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.