Home / 20,985.51-28,940.03-16,197.80

Finding the Fourth Proportional to 20,985.51, 28,940.03 and 16,197.80

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Solution

The fourth proportional to 20,985.51, 28,940.03 and 16,197.80 is: 22,337.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,985.51 : 28,940.03 = 16,197.80 : x
  2. Step 2: Convert to fraction form
    20,985.51/28,940.03 = 16,197.80/x
  3. Step 3: Cross multiply
    20,985.51x = 28,940.03 × 16,197.80
  4. Step 4: Simplify right side
    20,985.51x = 468,764,817.93
  5. Step 5: Solve for x
    x = 468,764,817.93/20,985.51
  6. Step 6: Final answer
    x = 22,337.55

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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.