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Finding the Fourth Proportional to 8,705.60, 12,013.63 and 4,928.66

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Solution

The fourth proportional to 8,705.60, 12,013.63 and 4,928.66 is: 6,801.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.60 : 12,013.63 = 4,928.66 : x
  2. Step 2: Convert to fraction form
    8,705.60/12,013.63 = 4,928.66/x
  3. Step 3: Cross multiply
    8,705.60x = 12,013.63 × 4,928.66
  4. Step 4: Simplify right side
    8,705.60x = 59,211,025.25
  5. Step 5: Solve for x
    x = 59,211,025.25/8,705.60
  6. Step 6: Final answer
    x = 6,801.49

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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.