Home / 8,085.41-12,128.11-5,126.81

Finding the Fourth Proportional to 8,085.41, 12,128.11 and 5,126.81

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Solution

The fourth proportional to 8,085.41, 12,128.11 and 5,126.81 is: 7,690.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,085.41 : 12,128.11 = 5,126.81 : x
  2. Step 2: Convert to fraction form
    8,085.41/12,128.11 = 5,126.81/x
  3. Step 3: Cross multiply
    8,085.41x = 12,128.11 × 5,126.81
  4. Step 4: Simplify right side
    8,085.41x = 62,178,477.25
  5. Step 5: Solve for x
    x = 62,178,477.25/8,085.41
  6. Step 6: Final answer
    x = 7,690.21

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