Home / 22,989.42-31,728.21-12,918.29

Finding the Fourth Proportional to 22,989.42, 31,728.21 and 12,918.29

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Solution

The fourth proportional to 22,989.42, 31,728.21 and 12,918.29 is: 17,828.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,989.42 : 31,728.21 = 12,918.29 : x
  2. Step 2: Convert to fraction form
    22,989.42/31,728.21 = 12,918.29/x
  3. Step 3: Cross multiply
    22,989.42x = 31,728.21 × 12,918.29
  4. Step 4: Simplify right side
    22,989.42x = 409,874,010.88
  5. Step 5: Solve for x
    x = 409,874,010.88/22,989.42
  6. Step 6: Final answer
    x = 17,828.81

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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.