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Finding the Fourth Proportional to 7,185.76, 9,916.21 and 4,391.26

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Solution

The fourth proportional to 7,185.76, 9,916.21 and 4,391.26 is: 6,059.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,185.76 : 9,916.21 = 4,391.26 : x
  2. Step 2: Convert to fraction form
    7,185.76/9,916.21 = 4,391.26/x
  3. Step 3: Cross multiply
    7,185.76x = 9,916.21 × 4,391.26
  4. Step 4: Simplify right side
    7,185.76x = 43,544,656.32
  5. Step 5: Solve for x
    x = 43,544,656.32/7,185.76
  6. Step 6: Final answer
    x = 6,059.85

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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.