Home / 28,831.72-39,788.46-15,911.44

Finding the Fourth Proportional to 28,831.72, 39,788.46 and 15,911.44

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Solution

The fourth proportional to 28,831.72, 39,788.46 and 15,911.44 is: 21,958.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,831.72 : 39,788.46 = 15,911.44 : x
  2. Step 2: Convert to fraction form
    28,831.72/39,788.46 = 15,911.44/x
  3. Step 3: Cross multiply
    28,831.72x = 39,788.46 × 15,911.44
  4. Step 4: Simplify right side
    28,831.72x = 633,091,693.98
  5. Step 5: Solve for x
    x = 633,091,693.98/28,831.72
  6. Step 6: Final answer
    x = 21,958.17

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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.