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Finding the Fourth Proportional to 28,475.35, 42,712.92 and 7,698.85

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Solution

The fourth proportional to 28,475.35, 42,712.92 and 7,698.85 is: 11,548.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,475.35 : 42,712.92 = 7,698.85 : x
  2. Step 2: Convert to fraction form
    28,475.35/42,712.92 = 7,698.85/x
  3. Step 3: Cross multiply
    28,475.35x = 42,712.92 × 7,698.85
  4. Step 4: Simplify right side
    28,475.35x = 328,840,257.36
  5. Step 5: Solve for x
    x = 328,840,257.36/28,475.35
  6. Step 6: Final answer
    x = 11,548.24

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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.