Home / 21,331.98-29,438.14-11,900.54

Finding the Fourth Proportional to 21,331.98, 29,438.14 and 11,900.54

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Solution

The fourth proportional to 21,331.98, 29,438.14 and 11,900.54 is: 16,422.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.98 : 29,438.14 = 11,900.54 : x
  2. Step 2: Convert to fraction form
    21,331.98/29,438.14 = 11,900.54/x
  3. Step 3: Cross multiply
    21,331.98x = 29,438.14 × 11,900.54
  4. Step 4: Simplify right side
    21,331.98x = 350,329,762.60
  5. Step 5: Solve for x
    x = 350,329,762.60/21,331.98
  6. Step 6: Final answer
    x = 16,422.75

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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.