Home / 21,640.75-29,864.24-15,364.06

Finding the Fourth Proportional to 21,640.75, 29,864.24 and 15,364.06

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Solution

The fourth proportional to 21,640.75, 29,864.24 and 15,364.06 is: 21,202.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,640.75 : 29,864.24 = 15,364.06 : x
  2. Step 2: Convert to fraction form
    21,640.75/29,864.24 = 15,364.06/x
  3. Step 3: Cross multiply
    21,640.75x = 29,864.24 × 15,364.06
  4. Step 4: Simplify right side
    21,640.75x = 458,835,975.21
  5. Step 5: Solve for x
    x = 458,835,975.21/21,640.75
  6. Step 6: Final answer
    x = 21,202.41

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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.