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Finding the Fourth Proportional to 8,707.76, 12,016.55 and 4,930.87

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Solution

The fourth proportional to 8,707.76, 12,016.55 and 4,930.87 is: 6,804.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.76 : 12,016.55 = 4,930.87 : x
  2. Step 2: Convert to fraction form
    8,707.76/12,016.55 = 4,930.87/x
  3. Step 3: Cross multiply
    8,707.76x = 12,016.55 × 4,930.87
  4. Step 4: Simplify right side
    8,707.76x = 59,251,961.16
  5. Step 5: Solve for x
    x = 59,251,961.16/8,707.76
  6. Step 6: Final answer
    x = 6,804.50

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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.