Home / 10,518.48-15,777.72-3,123.09

Finding the Fourth Proportional to 10,518.48, 15,777.72 and 3,123.09

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Solution

The fourth proportional to 10,518.48, 15,777.72 and 3,123.09 is: 4,684.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,518.48 : 15,777.72 = 3,123.09 : x
  2. Step 2: Convert to fraction form
    10,518.48/15,777.72 = 3,123.09/x
  3. Step 3: Cross multiply
    10,518.48x = 15,777.72 × 3,123.09
  4. Step 4: Simplify right side
    10,518.48x = 49,275,239.55
  5. Step 5: Solve for x
    x = 49,275,239.55/10,518.48
  6. Step 6: Final answer
    x = 4,684.64

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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.