Home / 20,891.12-28,831.02-13,805.24

Finding the Fourth Proportional to 20,891.12, 28,831.02 and 13,805.24

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Solution

The fourth proportional to 20,891.12, 28,831.02 and 13,805.24 is: 19,052.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.12 : 28,831.02 = 13,805.24 : x
  2. Step 2: Convert to fraction form
    20,891.12/28,831.02 = 13,805.24/x
  3. Step 3: Cross multiply
    20,891.12x = 28,831.02 × 13,805.24
  4. Step 4: Simplify right side
    20,891.12x = 398,019,150.54
  5. Step 5: Solve for x
    x = 398,019,150.54/20,891.12
  6. Step 6: Final answer
    x = 19,052.07

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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.