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Finding the Fourth Proportional to 19,311.36, 28,965.48 and 7,624.68

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Solution

The fourth proportional to 19,311.36, 28,965.48 and 7,624.68 is: 11,436.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,311.36 : 28,965.48 = 7,624.68 : x
  2. Step 2: Convert to fraction form
    19,311.36/28,965.48 = 7,624.68/x
  3. Step 3: Cross multiply
    19,311.36x = 28,965.48 × 7,624.68
  4. Step 4: Simplify right side
    19,311.36x = 220,852,516.05
  5. Step 5: Solve for x
    x = 220,852,516.05/19,311.36
  6. Step 6: Final answer
    x = 11,436.40

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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.