Home / 21,078.09-29,047.82-15,099.48

Finding the Fourth Proportional to 21,078.09, 29,047.82 and 15,099.48

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Solution

The fourth proportional to 21,078.09, 29,047.82 and 15,099.48 is: 20,808.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.09 : 29,047.82 = 15,099.48 : x
  2. Step 2: Convert to fraction form
    21,078.09/29,047.82 = 15,099.48/x
  3. Step 3: Cross multiply
    21,078.09x = 29,047.82 × 15,099.48
  4. Step 4: Simplify right side
    21,078.09x = 438,606,901.64
  5. Step 5: Solve for x
    x = 438,606,901.64/21,078.09
  6. Step 6: Final answer
    x = 20,808.66

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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.