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Finding the Fourth Proportional to 28,814, 39,763.32 and 16,239.20

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Solution

The fourth proportional to 28,814, 39,763.32 and 16,239.20 is: 22,410.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,814 : 39,763.32 = 16,239.20 : x
  2. Step 2: Convert to fraction form
    28,814/39,763.32 = 16,239.20/x
  3. Step 3: Cross multiply
    28,814x = 39,763.32 × 16,239.20
  4. Step 4: Simplify right side
    28,814x = 645,724,506.14
  5. Step 5: Solve for x
    x = 645,724,506.14/28,814
  6. Step 6: Final answer
    x = 22,410.10

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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.