Home / 21,120.44-31,838.88-19,693.48

Finding the Fourth Proportional to 21,120.44, 31,838.88 and 19,693.48

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Solution

The fourth proportional to 21,120.44, 31,838.88 and 19,693.48 is: 29,687.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.44 : 31,838.88 = 19,693.48 : x
  2. Step 2: Convert to fraction form
    21,120.44/31,838.88 = 19,693.48/x
  3. Step 3: Cross multiply
    21,120.44x = 31,838.88 × 19,693.48
  4. Step 4: Simplify right side
    21,120.44x = 627,018,346.50
  5. Step 5: Solve for x
    x = 627,018,346.50/21,120.44
  6. Step 6: Final answer
    x = 29,687.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.