Home / 20,574.48-28,400.40-13,879.20

Finding the Fourth Proportional to 20,574.48, 28,400.40 and 13,879.20

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Solution

The fourth proportional to 20,574.48, 28,400.40 and 13,879.20 is: 19,158.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,574.48 : 28,400.40 = 13,879.20 : x
  2. Step 2: Convert to fraction form
    20,574.48/28,400.40 = 13,879.20/x
  3. Step 3: Cross multiply
    20,574.48x = 28,400.40 × 13,879.20
  4. Step 4: Simplify right side
    20,574.48x = 394,174,831.68
  5. Step 5: Solve for x
    x = 394,174,831.68/20,574.48
  6. Step 6: Final answer
    x = 19,158.43

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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.