Home / 12,190.23-18,285.35-4,290.89

Finding the Fourth Proportional to 12,190.23, 18,285.35 and 4,290.89

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Solution

The fourth proportional to 12,190.23, 18,285.35 and 4,290.89 is: 6,436.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.23 : 18,285.35 = 4,290.89 : x
  2. Step 2: Convert to fraction form
    12,190.23/18,285.35 = 4,290.89/x
  3. Step 3: Cross multiply
    12,190.23x = 18,285.35 × 4,290.89
  4. Step 4: Simplify right side
    12,190.23x = 78,460,312.58
  5. Step 5: Solve for x
    x = 78,460,312.58/12,190.23
  6. Step 6: Final answer
    x = 6,436.33

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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.