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Finding the Fourth Proportional to 7,153.53, 9,869.57 and 4,128.18

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Solution

The fourth proportional to 7,153.53, 9,869.57 and 4,128.18 is: 5,695.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,153.53 : 9,869.57 = 4,128.18 : x
  2. Step 2: Convert to fraction form
    7,153.53/9,869.57 = 4,128.18/x
  3. Step 3: Cross multiply
    7,153.53x = 9,869.57 × 4,128.18
  4. Step 4: Simplify right side
    7,153.53x = 40,743,340.84
  5. Step 5: Solve for x
    x = 40,743,340.84/7,153.53
  6. Step 6: Final answer
    x = 5,695.56

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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.