Home / 21,331.74-29,438.61-11,902.14

Finding the Fourth Proportional to 21,331.74, 29,438.61 and 11,902.14

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Solution

The fourth proportional to 21,331.74, 29,438.61 and 11,902.14 is: 16,425.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.74 : 29,438.61 = 11,902.14 : x
  2. Step 2: Convert to fraction form
    21,331.74/29,438.61 = 11,902.14/x
  3. Step 3: Cross multiply
    21,331.74x = 29,438.61 × 11,902.14
  4. Step 4: Simplify right side
    21,331.74x = 350,382,457.63
  5. Step 5: Solve for x
    x = 350,382,457.63/21,331.74
  6. Step 6: Final answer
    x = 16,425.40

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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.