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Finding the Fourth Proportional to 18,903.82, 28,359.95 and 5,757.21

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Solution

The fourth proportional to 18,903.82, 28,359.95 and 5,757.21 is: 8,637.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.82 : 28,359.95 = 5,757.21 : x
  2. Step 2: Convert to fraction form
    18,903.82/28,359.95 = 5,757.21/x
  3. Step 3: Cross multiply
    18,903.82x = 28,359.95 × 5,757.21
  4. Step 4: Simplify right side
    18,903.82x = 163,274,187.74
  5. Step 5: Solve for x
    x = 163,274,187.74/18,903.82
  6. Step 6: Final answer
    x = 8,637.10

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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.