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Finding the Fourth Proportional to 18,865.98, 28,297.34 and 6,385.74

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Solution

The fourth proportional to 18,865.98, 28,297.34 and 6,385.74 is: 9,578.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.98 : 28,297.34 = 6,385.74 : x
  2. Step 2: Convert to fraction form
    18,865.98/28,297.34 = 6,385.74/x
  3. Step 3: Cross multiply
    18,865.98x = 28,297.34 × 6,385.74
  4. Step 4: Simplify right side
    18,865.98x = 180,699,341.83
  5. Step 5: Solve for x
    x = 180,699,341.83/18,865.98
  6. Step 6: Final answer
    x = 9,578.05

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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.