Home / 21,301.10-29,390.27-13,231.07

Finding the Fourth Proportional to 21,301.10, 29,390.27 and 13,231.07

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Solution

The fourth proportional to 21,301.10, 29,390.27 and 13,231.07 is: 18,255.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301.10 : 29,390.27 = 13,231.07 : x
  2. Step 2: Convert to fraction form
    21,301.10/29,390.27 = 13,231.07/x
  3. Step 3: Cross multiply
    21,301.10x = 29,390.27 × 13,231.07
  4. Step 4: Simplify right side
    21,301.10x = 388,864,506.58
  5. Step 5: Solve for x
    x = 388,864,506.58/21,301.10
  6. Step 6: Final answer
    x = 18,255.61

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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.