Home / 21,028.56-31,448.16-18,702.24

Finding the Fourth Proportional to 21,028.56, 31,448.16 and 18,702.24

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Solution

The fourth proportional to 21,028.56, 31,448.16 and 18,702.24 is: 27,969.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,028.56 : 31,448.16 = 18,702.24 : x
  2. Step 2: Convert to fraction form
    21,028.56/31,448.16 = 18,702.24/x
  3. Step 3: Cross multiply
    21,028.56x = 31,448.16 × 18,702.24
  4. Step 4: Simplify right side
    21,028.56x = 588,151,035.88
  5. Step 5: Solve for x
    x = 588,151,035.88/21,028.56
  6. Step 6: Final answer
    x = 27,969.15

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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.