Home / 20,822.47-28,727.05-12,748.80

Finding the Fourth Proportional to 20,822.47, 28,727.05 and 12,748.80

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Solution

The fourth proportional to 20,822.47, 28,727.05 and 12,748.80 is: 17,588.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.47 : 28,727.05 = 12,748.80 : x
  2. Step 2: Convert to fraction form
    20,822.47/28,727.05 = 12,748.80/x
  3. Step 3: Cross multiply
    20,822.47x = 28,727.05 × 12,748.80
  4. Step 4: Simplify right side
    20,822.47x = 366,235,415.04
  5. Step 5: Solve for x
    x = 366,235,415.04/20,822.47
  6. Step 6: Final answer
    x = 17,588.47

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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.