Home / 21,836.78-30,144.11-15,040.34

Finding the Fourth Proportional to 21,836.78, 30,144.11 and 15,040.34

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Solution

The fourth proportional to 21,836.78, 30,144.11 and 15,040.34 is: 20,762.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,836.78 : 30,144.11 = 15,040.34 : x
  2. Step 2: Convert to fraction form
    21,836.78/30,144.11 = 15,040.34/x
  3. Step 3: Cross multiply
    21,836.78x = 30,144.11 × 15,040.34
  4. Step 4: Simplify right side
    21,836.78x = 453,377,437.48
  5. Step 5: Solve for x
    x = 453,377,437.48/21,836.78
  6. Step 6: Final answer
    x = 20,762.11

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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.