Home / 13,181.02-18,189.78-7,212.67

Finding the Fourth Proportional to 13,181.02, 18,189.78 and 7,212.67

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Solution

The fourth proportional to 13,181.02, 18,189.78 and 7,212.67 is: 9,953.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,181.02 : 18,189.78 = 7,212.67 : x
  2. Step 2: Convert to fraction form
    13,181.02/18,189.78 = 7,212.67/x
  3. Step 3: Cross multiply
    13,181.02x = 18,189.78 × 7,212.67
  4. Step 4: Simplify right side
    13,181.02x = 131,196,880.51
  5. Step 5: Solve for x
    x = 131,196,880.51/13,181.02
  6. Step 6: Final answer
    x = 9,953.47

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.