Home / 15,714.57-21,720.78-13,811.88

Finding the Fourth Proportional to 15,714.57, 21,720.78 and 13,811.88

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Solution

The fourth proportional to 15,714.57, 21,720.78 and 13,811.88 is: 19,090.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,714.57 : 21,720.78 = 13,811.88 : x
  2. Step 2: Convert to fraction form
    15,714.57/21,720.78 = 13,811.88/x
  3. Step 3: Cross multiply
    15,714.57x = 21,720.78 × 13,811.88
  4. Step 4: Simplify right side
    15,714.57x = 300,004,806.87
  5. Step 5: Solve for x
    x = 300,004,806.87/15,714.57
  6. Step 6: Final answer
    x = 19,090.87

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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.