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Finding the Fourth Proportional to 15,101.80, 20,842.02 and 8,813.80

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Solution

The fourth proportional to 15,101.80, 20,842.02 and 8,813.80 is: 12,163.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,101.80 : 20,842.02 = 8,813.80 : x
  2. Step 2: Convert to fraction form
    15,101.80/20,842.02 = 8,813.80/x
  3. Step 3: Cross multiply
    15,101.80x = 20,842.02 × 8,813.80
  4. Step 4: Simplify right side
    15,101.80x = 183,697,395.88
  5. Step 5: Solve for x
    x = 183,697,395.88/15,101.80
  6. Step 6: Final answer
    x = 12,163.94

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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.