Home / 21,270.36-31,923.98-21,221.16

Finding the Fourth Proportional to 21,270.36, 31,923.98 and 21,221.16

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Solution

The fourth proportional to 21,270.36, 31,923.98 and 21,221.16 is: 31,850.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.36 : 31,923.98 = 21,221.16 : x
  2. Step 2: Convert to fraction form
    21,270.36/31,923.98 = 21,221.16/x
  3. Step 3: Cross multiply
    21,270.36x = 31,923.98 × 21,221.16
  4. Step 4: Simplify right side
    21,270.36x = 677,463,887.42
  5. Step 5: Solve for x
    x = 677,463,887.42/21,270.36
  6. Step 6: Final answer
    x = 31,850.14

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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.