Home / 21,975.66-30,325.79-12,900.88

Finding the Fourth Proportional to 21,975.66, 30,325.79 and 12,900.88

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Solution

The fourth proportional to 21,975.66, 30,325.79 and 12,900.88 is: 17,802.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.66 : 30,325.79 = 12,900.88 : x
  2. Step 2: Convert to fraction form
    21,975.66/30,325.79 = 12,900.88/x
  3. Step 3: Cross multiply
    21,975.66x = 30,325.79 × 12,900.88
  4. Step 4: Simplify right side
    21,975.66x = 391,229,161.56
  5. Step 5: Solve for x
    x = 391,229,161.56/21,975.66
  6. Step 6: Final answer
    x = 17,802.84

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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.