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Finding the Fourth Proportional to 8,612.76, 11,885.14 and 4,784.20

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Solution

The fourth proportional to 8,612.76, 11,885.14 and 4,784.20 is: 6,601.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.76 : 11,885.14 = 4,784.20 : x
  2. Step 2: Convert to fraction form
    8,612.76/11,885.14 = 4,784.20/x
  3. Step 3: Cross multiply
    8,612.76x = 11,885.14 × 4,784.20
  4. Step 4: Simplify right side
    8,612.76x = 56,860,886.79
  5. Step 5: Solve for x
    x = 56,860,886.79/8,612.76
  6. Step 6: Final answer
    x = 6,601.94

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Half scale
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Double scale
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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.