Home / 21,187.23-29,256.96-13,243.02

Finding the Fourth Proportional to 21,187.23, 29,256.96 and 13,243.02

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Solution

The fourth proportional to 21,187.23, 29,256.96 and 13,243.02 is: 18,286.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.23 : 29,256.96 = 13,243.02 : x
  2. Step 2: Convert to fraction form
    21,187.23/29,256.96 = 13,243.02/x
  3. Step 3: Cross multiply
    21,187.23x = 29,256.96 × 13,243.02
  4. Step 4: Simplify right side
    21,187.23x = 387,450,506.42
  5. Step 5: Solve for x
    x = 387,450,506.42/21,187.23
  6. Step 6: Final answer
    x = 18,286.98

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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.