Home / 20,816.93-28,728.03-11,385.48

Finding the Fourth Proportional to 20,816.93, 28,728.03 and 11,385.48

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Solution

The fourth proportional to 20,816.93, 28,728.03 and 11,385.48 is: 15,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,816.93 : 28,728.03 = 11,385.48 : x
  2. Step 2: Convert to fraction form
    20,816.93/28,728.03 = 11,385.48/x
  3. Step 3: Cross multiply
    20,816.93x = 28,728.03 × 11,385.48
  4. Step 4: Simplify right side
    20,816.93x = 327,082,411.00
  5. Step 5: Solve for x
    x = 327,082,411.00/20,816.93
  6. Step 6: Final answer
    x = 15,712.33

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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.