Home / 15,831.86-21,847.68-8,758.28

Finding the Fourth Proportional to 15,831.86, 21,847.68 and 8,758.28

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Solution

The fourth proportional to 15,831.86, 21,847.68 and 8,758.28 is: 12,086.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,831.86 : 21,847.68 = 8,758.28 : x
  2. Step 2: Convert to fraction form
    15,831.86/21,847.68 = 8,758.28/x
  3. Step 3: Cross multiply
    15,831.86x = 21,847.68 × 8,758.28
  4. Step 4: Simplify right side
    15,831.86x = 191,347,989.55
  5. Step 5: Solve for x
    x = 191,347,989.55/15,831.86
  6. Step 6: Final answer
    x = 12,086.26

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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.