Home / 21,807.20-30,096.96-12,857.24

Finding the Fourth Proportional to 21,807.20, 30,096.96 and 12,857.24

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Solution

The fourth proportional to 21,807.20, 30,096.96 and 12,857.24 is: 17,744.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,807.20 : 30,096.96 = 12,857.24 : x
  2. Step 2: Convert to fraction form
    21,807.20/30,096.96 = 12,857.24/x
  3. Step 3: Cross multiply
    21,807.20x = 30,096.96 × 12,857.24
  4. Step 4: Simplify right side
    21,807.20x = 386,963,837.99
  5. Step 5: Solve for x
    x = 386,963,837.99/21,807.20
  6. Step 6: Final answer
    x = 17,744.77

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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.