Home / 21,142.88-29,164.34-13,972.85

Finding the Fourth Proportional to 21,142.88, 29,164.34 and 13,972.85

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Solution

The fourth proportional to 21,142.88, 29,164.34 and 13,972.85 is: 19,274.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,142.88 : 29,164.34 = 13,972.85 : x
  2. Step 2: Convert to fraction form
    21,142.88/29,164.34 = 13,972.85/x
  3. Step 3: Cross multiply
    21,142.88x = 29,164.34 × 13,972.85
  4. Step 4: Simplify right side
    21,142.88x = 407,509,056.01
  5. Step 5: Solve for x
    x = 407,509,056.01/21,142.88
  6. Step 6: Final answer
    x = 19,274.06

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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.