Home / 20,827.09-28,742.10-11,395.65

Finding the Fourth Proportional to 20,827.09, 28,742.10 and 11,395.65

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Solution

The fourth proportional to 20,827.09, 28,742.10 and 11,395.65 is: 15,726.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,827.09 : 28,742.10 = 11,395.65 : x
  2. Step 2: Convert to fraction form
    20,827.09/28,742.10 = 11,395.65/x
  3. Step 3: Cross multiply
    20,827.09x = 28,742.10 × 11,395.65
  4. Step 4: Simplify right side
    20,827.09x = 327,534,911.87
  5. Step 5: Solve for x
    x = 327,534,911.87/20,827.09
  6. Step 6: Final answer
    x = 15,726.39

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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.