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Finding the Fourth Proportional to 18,816.40, 28,275.60 and 10,057.60

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Solution

The fourth proportional to 18,816.40, 28,275.60 and 10,057.60 is: 15,113.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.40 : 28,275.60 = 10,057.60 : x
  2. Step 2: Convert to fraction form
    18,816.40/28,275.60 = 10,057.60/x
  3. Step 3: Cross multiply
    18,816.40x = 28,275.60 × 10,057.60
  4. Step 4: Simplify right side
    18,816.40x = 284,384,674.56
  5. Step 5: Solve for x
    x = 284,384,674.56/18,816.40
  6. Step 6: Final answer
    x = 15,113.66

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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.