Home / 21,831.95-30,128.07-11,895.95

Finding the Fourth Proportional to 21,831.95, 30,128.07 and 11,895.95

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Solution

The fourth proportional to 21,831.95, 30,128.07 and 11,895.95 is: 16,416.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,831.95 : 30,128.07 = 11,895.95 : x
  2. Step 2: Convert to fraction form
    21,831.95/30,128.07 = 11,895.95/x
  3. Step 3: Cross multiply
    21,831.95x = 30,128.07 × 11,895.95
  4. Step 4: Simplify right side
    21,831.95x = 358,401,863.68
  5. Step 5: Solve for x
    x = 358,401,863.68/21,831.95
  6. Step 6: Final answer
    x = 16,416.40

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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.