Home / 13,631.76-18,811.80-7,663.44

Finding the Fourth Proportional to 13,631.76, 18,811.80 and 7,663.44

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Solution

The fourth proportional to 13,631.76, 18,811.80 and 7,663.44 is: 10,575.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.76 : 18,811.80 = 7,663.44 : x
  2. Step 2: Convert to fraction form
    13,631.76/18,811.80 = 7,663.44/x
  3. Step 3: Cross multiply
    13,631.76x = 18,811.80 × 7,663.44
  4. Step 4: Simplify right side
    13,631.76x = 144,163,171.14
  5. Step 5: Solve for x
    x = 144,163,171.14/13,631.76
  6. Step 6: Final answer
    x = 10,575.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.