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Finding the Fourth Proportional to 8,055.60, 11,128.98 and 6,443.94

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Solution

The fourth proportional to 8,055.60, 11,128.98 and 6,443.94 is: 8,902.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,055.60 : 11,128.98 = 6,443.94 : x
  2. Step 2: Convert to fraction form
    8,055.60/11,128.98 = 6,443.94/x
  3. Step 3: Cross multiply
    8,055.60x = 11,128.98 × 6,443.94
  4. Step 4: Simplify right side
    8,055.60x = 71,714,479.38
  5. Step 5: Solve for x
    x = 71,714,479.38/8,055.60
  6. Step 6: Final answer
    x = 8,902.44

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Half scale
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Double scale
Find fourth proportional to 8,056.60, 11,130.36 and 6,444.94
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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.