Home / 21,269.12-29,321.16-15,298.88

Finding the Fourth Proportional to 21,269.12, 29,321.16 and 15,298.88

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Solution

The fourth proportional to 21,269.12, 29,321.16 and 15,298.88 is: 21,090.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.12 : 29,321.16 = 15,298.88 : x
  2. Step 2: Convert to fraction form
    21,269.12/29,321.16 = 15,298.88/x
  3. Step 3: Cross multiply
    21,269.12x = 29,321.16 × 15,298.88
  4. Step 4: Simplify right side
    21,269.12x = 448,580,908.30
  5. Step 5: Solve for x
    x = 448,580,908.30/21,269.12
  6. Step 6: Final answer
    x = 21,090.71

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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.