Home / 5,419.41-8,129.11-1,315.41

Finding the Fourth Proportional to 5,419.41, 8,129.11 and 1,315.41

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Solution

The fourth proportional to 5,419.41, 8,129.11 and 1,315.41 is: 1,973.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,419.41 : 8,129.11 = 1,315.41 : x
  2. Step 2: Convert to fraction form
    5,419.41/8,129.11 = 1,315.41/x
  3. Step 3: Cross multiply
    5,419.41x = 8,129.11 × 1,315.41
  4. Step 4: Simplify right side
    5,419.41x = 10,693,081.28
  5. Step 5: Solve for x
    x = 10,693,081.28/5,419.41
  6. Step 6: Final answer
    x = 1,973.11

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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.