Home / 20,348.16-28,081.08-11,395.64

Finding the Fourth Proportional to 20,348.16, 28,081.08 and 11,395.64

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Solution

The fourth proportional to 20,348.16, 28,081.08 and 11,395.64 is: 15,726.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,348.16 : 28,081.08 = 11,395.64 : x
  2. Step 2: Convert to fraction form
    20,348.16/28,081.08 = 11,395.64/x
  3. Step 3: Cross multiply
    20,348.16x = 28,081.08 × 11,395.64
  4. Step 4: Simplify right side
    20,348.16x = 320,001,878.49
  5. Step 5: Solve for x
    x = 320,001,878.49/20,348.16
  6. Step 6: Final answer
    x = 15,726.33

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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.