Home / 21,862.67-30,170.54-12,431.30

Finding the Fourth Proportional to 21,862.67, 30,170.54 and 12,431.30

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Solution

The fourth proportional to 21,862.67, 30,170.54 and 12,431.30 is: 17,155.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.67 : 30,170.54 = 12,431.30 : x
  2. Step 2: Convert to fraction form
    21,862.67/30,170.54 = 12,431.30/x
  3. Step 3: Cross multiply
    21,862.67x = 30,170.54 × 12,431.30
  4. Step 4: Simplify right side
    21,862.67x = 375,058,914.13
  5. Step 5: Solve for x
    x = 375,058,914.13/21,862.67
  6. Step 6: Final answer
    x = 17,155.22

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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.