Home / 21,266.36-31,901.01-7,220.66

Finding the Fourth Proportional to 21,266.36, 31,901.01 and 7,220.66

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Solution

The fourth proportional to 21,266.36, 31,901.01 and 7,220.66 is: 10,831.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,266.36 : 31,901.01 = 7,220.66 : x
  2. Step 2: Convert to fraction form
    21,266.36/31,901.01 = 7,220.66/x
  3. Step 3: Cross multiply
    21,266.36x = 31,901.01 × 7,220.66
  4. Step 4: Simplify right side
    21,266.36x = 230,346,160.28
  5. Step 5: Solve for x
    x = 230,346,160.28/21,266.36
  6. Step 6: Final answer
    x = 10,831.48

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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.