Home / 21,143.53-29,178.07-12,760.03

Finding the Fourth Proportional to 21,143.53, 29,178.07 and 12,760.03

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Solution

The fourth proportional to 21,143.53, 29,178.07 and 12,760.03 is: 17,608.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.53 : 29,178.07 = 12,760.03 : x
  2. Step 2: Convert to fraction form
    21,143.53/29,178.07 = 12,760.03/x
  3. Step 3: Cross multiply
    21,143.53x = 29,178.07 × 12,760.03
  4. Step 4: Simplify right side
    21,143.53x = 372,313,124.89
  5. Step 5: Solve for x
    x = 372,313,124.89/21,143.53
  6. Step 6: Final answer
    x = 17,608.84

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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.