Home / 28,831.43-39,728.31-21,265.77

Finding the Fourth Proportional to 28,831.43, 39,728.31 and 21,265.77

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Solution

The fourth proportional to 28,831.43, 39,728.31 and 21,265.77 is: 29,303.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,831.43 : 39,728.31 = 21,265.77 : x
  2. Step 2: Convert to fraction form
    28,831.43/39,728.31 = 21,265.77/x
  3. Step 3: Cross multiply
    28,831.43x = 39,728.31 × 21,265.77
  4. Step 4: Simplify right side
    28,831.43x = 844,853,102.95
  5. Step 5: Solve for x
    x = 844,853,102.95/28,831.43
  6. Step 6: Final answer
    x = 29,303.20

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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.