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Finding the Fourth Proportional to 9,947.58, 13,728 and 5,916.54

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Solution

The fourth proportional to 9,947.58, 13,728 and 5,916.54 is: 8,165.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,947.58 : 13,728 = 5,916.54 : x
  2. Step 2: Convert to fraction form
    9,947.58/13,728 = 5,916.54/x
  3. Step 3: Cross multiply
    9,947.58x = 13,728 × 5,916.54
  4. Step 4: Simplify right side
    9,947.58x = 81,222,261.12
  5. Step 5: Solve for x
    x = 81,222,261.12/9,947.58
  6. Step 6: Final answer
    x = 8,165.03

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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.