Home / 20,828.16-28,742.94-11,397.24

Finding the Fourth Proportional to 20,828.16, 28,742.94 and 11,397.24

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Solution

The fourth proportional to 20,828.16, 28,742.94 and 11,397.24 is: 15,728.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.16 : 28,742.94 = 11,397.24 : x
  2. Step 2: Convert to fraction form
    20,828.16/28,742.94 = 11,397.24/x
  3. Step 3: Cross multiply
    20,828.16x = 28,742.94 × 11,397.24
  4. Step 4: Simplify right side
    20,828.16x = 327,590,185.49
  5. Step 5: Solve for x
    x = 327,590,185.49/20,828.16
  6. Step 6: Final answer
    x = 15,728.23

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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.