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Finding the Fourth Proportional to 18,903.52, 28,359.90 and 5,755.18

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Solution

The fourth proportional to 18,903.52, 28,359.90 and 5,755.18 is: 8,634.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.52 : 28,359.90 = 5,755.18 : x
  2. Step 2: Convert to fraction form
    18,903.52/28,359.90 = 5,755.18/x
  3. Step 3: Cross multiply
    18,903.52x = 28,359.90 × 5,755.18
  4. Step 4: Simplify right side
    18,903.52x = 163,216,329.28
  5. Step 5: Solve for x
    x = 163,216,329.28/18,903.52
  6. Step 6: Final answer
    x = 8,634.18

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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.