Home / 21,120.56-29,141.42-14,420.14

Finding the Fourth Proportional to 21,120.56, 29,141.42 and 14,420.14

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Solution

The fourth proportional to 21,120.56, 29,141.42 and 14,420.14 is: 19,896.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,120.56 : 29,141.42 = 14,420.14 : x
  2. Step 2: Convert to fraction form
    21,120.56/29,141.42 = 14,420.14/x
  3. Step 3: Cross multiply
    21,120.56x = 29,141.42 × 14,420.14
  4. Step 4: Simplify right side
    21,120.56x = 420,223,356.20
  5. Step 5: Solve for x
    x = 420,223,356.20/21,120.56
  6. Step 6: Final answer
    x = 19,896.41

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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.