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Finding the Fourth Proportional to 18,810.20, 28,210.80 and 10,895.60

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Solution

The fourth proportional to 18,810.20, 28,210.80 and 10,895.60 is: 16,340.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.20 : 28,210.80 = 10,895.60 : x
  2. Step 2: Convert to fraction form
    18,810.20/28,210.80 = 10,895.60/x
  3. Step 3: Cross multiply
    18,810.20x = 28,210.80 × 10,895.60
  4. Step 4: Simplify right side
    18,810.20x = 307,373,592.48
  5. Step 5: Solve for x
    x = 307,373,592.48/18,810.20
  6. Step 6: Final answer
    x = 16,340.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.