Home / 5,415.16-8,122.76-1,311.16

Finding the Fourth Proportional to 5,415.16, 8,122.76 and 1,311.16

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Solution

The fourth proportional to 5,415.16, 8,122.76 and 1,311.16 is: 1,966.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.16 : 8,122.76 = 1,311.16 : x
  2. Step 2: Convert to fraction form
    5,415.16/8,122.76 = 1,311.16/x
  3. Step 3: Cross multiply
    5,415.16x = 8,122.76 × 1,311.16
  4. Step 4: Simplify right side
    5,415.16x = 10,650,238.00
  5. Step 5: Solve for x
    x = 10,650,238.00/5,415.16
  6. Step 6: Final answer
    x = 1,966.74

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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.