Home / 21,620.43-29,831.63-13,127.03

Finding the Fourth Proportional to 21,620.43, 29,831.63 and 13,127.03

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Solution

The fourth proportional to 21,620.43, 29,831.63 and 13,127.03 is: 18,112.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,620.43 : 29,831.63 = 13,127.03 : x
  2. Step 2: Convert to fraction form
    21,620.43/29,831.63 = 13,127.03/x
  3. Step 3: Cross multiply
    21,620.43x = 29,831.63 × 13,127.03
  4. Step 4: Simplify right side
    21,620.43x = 391,600,487.17
  5. Step 5: Solve for x
    x = 391,600,487.17/21,620.43
  6. Step 6: Final answer
    x = 18,112.52

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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.