Home / 21,902.04-30,213.96-12,945.24

Finding the Fourth Proportional to 21,902.04, 30,213.96 and 12,945.24

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Solution

The fourth proportional to 21,902.04, 30,213.96 and 12,945.24 is: 17,858.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,902.04 : 30,213.96 = 12,945.24 : x
  2. Step 2: Convert to fraction form
    21,902.04/30,213.96 = 12,945.24/x
  3. Step 3: Cross multiply
    21,902.04x = 30,213.96 × 12,945.24
  4. Step 4: Simplify right side
    21,902.04x = 391,126,963.55
  5. Step 5: Solve for x
    x = 391,126,963.55/21,902.04
  6. Step 6: Final answer
    x = 17,858.02

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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.