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Finding the Fourth Proportional to 28,469.77, 42,705.70 and 10,698.57

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Solution

The fourth proportional to 28,469.77, 42,705.70 and 10,698.57 is: 16,048.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,469.77 : 42,705.70 = 10,698.57 : x
  2. Step 2: Convert to fraction form
    28,469.77/42,705.70 = 10,698.57/x
  3. Step 3: Cross multiply
    28,469.77x = 42,705.70 × 10,698.57
  4. Step 4: Simplify right side
    28,469.77x = 456,889,894.10
  5. Step 5: Solve for x
    x = 456,889,894.10/28,469.77
  6. Step 6: Final answer
    x = 16,048.25

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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.