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Finding the Fourth Proportional to 13,479.32, 18,601.98 and 7,813.98

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Solution

The fourth proportional to 13,479.32, 18,601.98 and 7,813.98 is: 10,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.32 : 18,601.98 = 7,813.98 : x
  2. Step 2: Convert to fraction form
    13,479.32/18,601.98 = 7,813.98/x
  3. Step 3: Cross multiply
    13,479.32x = 18,601.98 × 7,813.98
  4. Step 4: Simplify right side
    13,479.32x = 145,355,499.68
  5. Step 5: Solve for x
    x = 145,355,499.68/13,479.32
  6. Step 6: Final answer
    x = 10,783.59

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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.