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Finding the Fourth Proportional to 8,705.71, 12,013.66 and 4,928.85

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Solution

The fourth proportional to 8,705.71, 12,013.66 and 4,928.85 is: 6,801.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,705.71 : 12,013.66 = 4,928.85 : x
  2. Step 2: Convert to fraction form
    8,705.71/12,013.66 = 4,928.85/x
  3. Step 3: Cross multiply
    8,705.71x = 12,013.66 × 4,928.85
  4. Step 4: Simplify right side
    8,705.71x = 59,213,534.25
  5. Step 5: Solve for x
    x = 59,213,534.25/8,705.71
  6. Step 6: Final answer
    x = 6,801.69

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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.