Home / 20,643.20-28,476.96-13,076.80

Finding the Fourth Proportional to 20,643.20, 28,476.96 and 13,076.80

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Solution

The fourth proportional to 20,643.20, 28,476.96 and 13,076.80 is: 18,039.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.20 : 28,476.96 = 13,076.80 : x
  2. Step 2: Convert to fraction form
    20,643.20/28,476.96 = 13,076.80/x
  3. Step 3: Cross multiply
    20,643.20x = 28,476.96 × 13,076.80
  4. Step 4: Simplify right side
    20,643.20x = 372,387,510.53
  5. Step 5: Solve for x
    x = 372,387,510.53/20,643.20
  6. Step 6: Final answer
    x = 18,039.23

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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.