Home / 21,218.24-31,803.36-10,808

Finding the Fourth Proportional to 21,218.24, 31,803.36 and 10,808

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Solution

The fourth proportional to 21,218.24, 31,803.36 and 10,808 is: 16,199.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.24 : 31,803.36 = 10,808 : x
  2. Step 2: Convert to fraction form
    21,218.24/31,803.36 = 10,808/x
  3. Step 3: Cross multiply
    21,218.24x = 31,803.36 × 10,808
  4. Step 4: Simplify right side
    21,218.24x = 343,730,714.88
  5. Step 5: Solve for x
    x = 343,730,714.88/21,218.24
  6. Step 6: Final answer
    x = 16,199.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.