Home / 12,663.72-18,995.58-3,430.44

Finding the Fourth Proportional to 12,663.72, 18,995.58 and 3,430.44

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Solution

The fourth proportional to 12,663.72, 18,995.58 and 3,430.44 is: 5,145.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.72 : 18,995.58 = 3,430.44 : x
  2. Step 2: Convert to fraction form
    12,663.72/18,995.58 = 3,430.44/x
  3. Step 3: Cross multiply
    12,663.72x = 18,995.58 × 3,430.44
  4. Step 4: Simplify right side
    12,663.72x = 65,163,197.46
  5. Step 5: Solve for x
    x = 65,163,197.46/12,663.72
  6. Step 6: Final answer
    x = 5,145.66

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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.