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Finding the Fourth Proportional to 13,759.58, 18,988.24 and 7,471.96

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Solution

The fourth proportional to 13,759.58, 18,988.24 and 7,471.96 is: 10,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.58 : 18,988.24 = 7,471.96 : x
  2. Step 2: Convert to fraction form
    13,759.58/18,988.24 = 7,471.96/x
  3. Step 3: Cross multiply
    13,759.58x = 18,988.24 × 7,471.96
  4. Step 4: Simplify right side
    13,759.58x = 141,879,369.75
  5. Step 5: Solve for x
    x = 141,879,369.75/13,759.58
  6. Step 6: Final answer
    x = 10,311.32

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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.