Home / 21,221.68-31,831.96-10,136.20

Finding the Fourth Proportional to 21,221.68, 31,831.96 and 10,136.20

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Solution

The fourth proportional to 21,221.68, 31,831.96 and 10,136.20 is: 15,204.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.68 : 31,831.96 = 10,136.20 : x
  2. Step 2: Convert to fraction form
    21,221.68/31,831.96 = 10,136.20/x
  3. Step 3: Cross multiply
    21,221.68x = 31,831.96 × 10,136.20
  4. Step 4: Simplify right side
    21,221.68x = 322,655,112.95
  5. Step 5: Solve for x
    x = 322,655,112.95/21,221.68
  6. Step 6: Final answer
    x = 15,204.03

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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.