Home / 21,669.44-29,905.94-13,170.81

Finding the Fourth Proportional to 21,669.44, 29,905.94 and 13,170.81

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Solution

The fourth proportional to 21,669.44, 29,905.94 and 13,170.81 is: 18,177.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,669.44 : 29,905.94 = 13,170.81 : x
  2. Step 2: Convert to fraction form
    21,669.44/29,905.94 = 13,170.81/x
  3. Step 3: Cross multiply
    21,669.44x = 29,905.94 × 13,170.81
  4. Step 4: Simplify right side
    21,669.44x = 393,885,598.69
  5. Step 5: Solve for x
    x = 393,885,598.69/21,669.44
  6. Step 6: Final answer
    x = 18,177.01

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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.