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Finding the Fourth Proportional to 18,977.50, 28,447.21 and 6,488.99

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Solution

The fourth proportional to 18,977.50, 28,447.21 and 6,488.99 is: 9,726.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,977.50 : 28,447.21 = 6,488.99 : x
  2. Step 2: Convert to fraction form
    18,977.50/28,447.21 = 6,488.99/x
  3. Step 3: Cross multiply
    18,977.50x = 28,447.21 × 6,488.99
  4. Step 4: Simplify right side
    18,977.50x = 184,593,581.83
  5. Step 5: Solve for x
    x = 184,593,581.83/18,977.50
  6. Step 6: Final answer
    x = 9,726.97

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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.