Home / 21,783.26-30,052.20-12,816.56

Finding the Fourth Proportional to 21,783.26, 30,052.20 and 12,816.56

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Solution

The fourth proportional to 21,783.26, 30,052.20 and 12,816.56 is: 17,681.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,783.26 : 30,052.20 = 12,816.56 : x
  2. Step 2: Convert to fraction form
    21,783.26/30,052.20 = 12,816.56/x
  3. Step 3: Cross multiply
    21,783.26x = 30,052.20 × 12,816.56
  4. Step 4: Simplify right side
    21,783.26x = 385,165,824.43
  5. Step 5: Solve for x
    x = 385,165,824.43/21,783.26
  6. Step 6: Final answer
    x = 17,681.73

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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.