Home / 12,385.50-18,578.25-3,620.49

Finding the Fourth Proportional to 12,385.50, 18,578.25 and 3,620.49

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Solution

The fourth proportional to 12,385.50, 18,578.25 and 3,620.49 is: 5,430.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,385.50 : 18,578.25 = 3,620.49 : x
  2. Step 2: Convert to fraction form
    12,385.50/18,578.25 = 3,620.49/x
  3. Step 3: Cross multiply
    12,385.50x = 18,578.25 × 3,620.49
  4. Step 4: Simplify right side
    12,385.50x = 67,262,368.34
  5. Step 5: Solve for x
    x = 67,262,368.34/12,385.50
  6. Step 6: Final answer
    x = 5,430.74

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Half scale
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Double scale
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Similar ratio
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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.