Home / 21,757.72-30,025.04-12,803.20

Finding the Fourth Proportional to 21,757.72, 30,025.04 and 12,803.20

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Solution

The fourth proportional to 21,757.72, 30,025.04 and 12,803.20 is: 17,668.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,757.72 : 30,025.04 = 12,803.20 : x
  2. Step 2: Convert to fraction form
    21,757.72/30,025.04 = 12,803.20/x
  3. Step 3: Cross multiply
    21,757.72x = 30,025.04 × 12,803.20
  4. Step 4: Simplify right side
    21,757.72x = 384,416,592.13
  5. Step 5: Solve for x
    x = 384,416,592.13/21,757.72
  6. Step 6: Final answer
    x = 17,668.05

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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.