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Finding the Fourth Proportional to 7,153.70, 9,872.42 and 4,009.68

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Solution

The fourth proportional to 7,153.70, 9,872.42 and 4,009.68 is: 5,533.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,153.70 : 9,872.42 = 4,009.68 : x
  2. Step 2: Convert to fraction form
    7,153.70/9,872.42 = 4,009.68/x
  3. Step 3: Cross multiply
    7,153.70x = 9,872.42 × 4,009.68
  4. Step 4: Simplify right side
    7,153.70x = 39,585,224.98
  5. Step 5: Solve for x
    x = 39,585,224.98/7,153.70
  6. Step 6: Final answer
    x = 5,533.54

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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.