Home / 13,831.71-20,659.37-12,513.43

Finding the Fourth Proportional to 13,831.71, 20,659.37 and 12,513.43

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Solution

The fourth proportional to 13,831.71, 20,659.37 and 12,513.43 is: 18,690.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,831.71 : 20,659.37 = 12,513.43 : x
  2. Step 2: Convert to fraction form
    13,831.71/20,659.37 = 12,513.43/x
  3. Step 3: Cross multiply
    13,831.71x = 20,659.37 × 12,513.43
  4. Step 4: Simplify right side
    13,831.71x = 258,519,580.34
  5. Step 5: Solve for x
    x = 258,519,580.34/13,831.71
  6. Step 6: Final answer
    x = 18,690.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.