Home / 13,431.02-20,146.55-5,109.12

Finding the Fourth Proportional to 13,431.02, 20,146.55 and 5,109.12

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Solution

The fourth proportional to 13,431.02, 20,146.55 and 5,109.12 is: 7,663.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,431.02 : 20,146.55 = 5,109.12 : x
  2. Step 2: Convert to fraction form
    13,431.02/20,146.55 = 5,109.12/x
  3. Step 3: Cross multiply
    13,431.02x = 20,146.55 × 5,109.12
  4. Step 4: Simplify right side
    13,431.02x = 102,931,141.54
  5. Step 5: Solve for x
    x = 102,931,141.54/13,431.02
  6. Step 6: Final answer
    x = 7,663.69

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Half scale
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Double scale
Find fourth proportional to 13,432.02, 20,148.05 and 5,110.12
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.