Home / 12,145.70-18,218.55-7,768.10

Finding the Fourth Proportional to 12,145.70, 18,218.55 and 7,768.10

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Solution

The fourth proportional to 12,145.70, 18,218.55 and 7,768.10 is: 11,652.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.70 : 18,218.55 = 7,768.10 : x
  2. Step 2: Convert to fraction form
    12,145.70/18,218.55 = 7,768.10/x
  3. Step 3: Cross multiply
    12,145.70x = 18,218.55 × 7,768.10
  4. Step 4: Simplify right side
    12,145.70x = 141,523,518.26
  5. Step 5: Solve for x
    x = 141,523,518.26/12,145.70
  6. Step 6: Final answer
    x = 11,652.15

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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.