Home / 21,939.39-30,276.99-12,507.75

Finding the Fourth Proportional to 21,939.39, 30,276.99 and 12,507.75

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Solution

The fourth proportional to 21,939.39, 30,276.99 and 12,507.75 is: 17,261.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.39 : 30,276.99 = 12,507.75 : x
  2. Step 2: Convert to fraction form
    21,939.39/30,276.99 = 12,507.75/x
  3. Step 3: Cross multiply
    21,939.39x = 30,276.99 × 12,507.75
  4. Step 4: Simplify right side
    21,939.39x = 378,697,021.67
  5. Step 5: Solve for x
    x = 378,697,021.67/21,939.39
  6. Step 6: Final answer
    x = 17,261.06

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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.