Home / 20,831.86-28,746.54-11,879.74

Finding the Fourth Proportional to 20,831.86, 28,746.54 and 11,879.74

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Solution

The fourth proportional to 20,831.86, 28,746.54 and 11,879.74 is: 16,393.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.86 : 28,746.54 = 11,879.74 : x
  2. Step 2: Convert to fraction form
    20,831.86/28,746.54 = 11,879.74/x
  3. Step 3: Cross multiply
    20,831.86x = 28,746.54 × 11,879.74
  4. Step 4: Simplify right side
    20,831.86x = 341,501,421.10
  5. Step 5: Solve for x
    x = 341,501,421.10/20,831.86
  6. Step 6: Final answer
    x = 16,393.23

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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.