Home / 22,781.21-31,437.16-13,220.60

Finding the Fourth Proportional to 22,781.21, 31,437.16 and 13,220.60

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Solution

The fourth proportional to 22,781.21, 31,437.16 and 13,220.60 is: 18,243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,781.21 : 31,437.16 = 13,220.60 : x
  2. Step 2: Convert to fraction form
    22,781.21/31,437.16 = 13,220.60/x
  3. Step 3: Cross multiply
    22,781.21x = 31,437.16 × 13,220.60
  4. Step 4: Simplify right side
    22,781.21x = 415,617,927.26
  5. Step 5: Solve for x
    x = 415,617,927.26/22,781.21
  6. Step 6: Final answer
    x = 18,243.90

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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.