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Finding the Fourth Proportional to 8,705.61, 12,010.77 and 4,928.31

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Solution

The fourth proportional to 8,705.61, 12,010.77 and 4,928.31 is: 6,799.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.61 : 12,010.77 = 4,928.31 : x
  2. Step 2: Convert to fraction form
    8,705.61/12,010.77 = 4,928.31/x
  3. Step 3: Cross multiply
    8,705.61x = 12,010.77 × 4,928.31
  4. Step 4: Simplify right side
    8,705.61x = 59,192,797.90
  5. Step 5: Solve for x
    x = 59,192,797.90/8,705.61
  6. Step 6: Final answer
    x = 6,799.39

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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.