Home / 13,831.30-20,755.15-12,955.64

Finding the Fourth Proportional to 13,831.30, 20,755.15 and 12,955.64

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Solution

The fourth proportional to 13,831.30, 20,755.15 and 12,955.64 is: 19,441.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.30 : 20,755.15 = 12,955.64 : x
  2. Step 2: Convert to fraction form
    13,831.30/20,755.15 = 12,955.64/x
  3. Step 3: Cross multiply
    13,831.30x = 20,755.15 × 12,955.64
  4. Step 4: Simplify right side
    13,831.30x = 268,896,271.04
  5. Step 5: Solve for x
    x = 268,896,271.04/13,831.30
  6. Step 6: Final answer
    x = 19,441.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.