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Finding the Fourth Proportional to 13,658.92, 20,475.42 and 4,889.32

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Solution

The fourth proportional to 13,658.92, 20,475.42 and 4,889.32 is: 7,329.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,658.92 : 20,475.42 = 4,889.32 : x
  2. Step 2: Convert to fraction form
    13,658.92/20,475.42 = 4,889.32/x
  3. Step 3: Cross multiply
    13,658.92x = 20,475.42 × 4,889.32
  4. Step 4: Simplify right side
    13,658.92x = 100,110,880.51
  5. Step 5: Solve for x
    x = 100,110,880.51/13,658.92
  6. Step 6: Final answer
    x = 7,329.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.