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Finding the Fourth Proportional to 8,954.65, 12,356.81 and 4,921.76

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Solution

The fourth proportional to 8,954.65, 12,356.81 and 4,921.76 is: 6,791.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,954.65 : 12,356.81 = 4,921.76 : x
  2. Step 2: Convert to fraction form
    8,954.65/12,356.81 = 4,921.76/x
  3. Step 3: Cross multiply
    8,954.65x = 12,356.81 × 4,921.76
  4. Step 4: Simplify right side
    8,954.65x = 60,817,253.19
  5. Step 5: Solve for x
    x = 60,817,253.19/8,954.65
  6. Step 6: Final answer
    x = 6,791.70

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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.