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Finding the Fourth Proportional to 28,572.95, 42,858.95 and 7,796.45

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Solution

The fourth proportional to 28,572.95, 42,858.95 and 7,796.45 is: 11,694.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,572.95 : 42,858.95 = 7,796.45 : x
  2. Step 2: Convert to fraction form
    28,572.95/42,858.95 = 7,796.45/x
  3. Step 3: Cross multiply
    28,572.95x = 42,858.95 × 7,796.45
  4. Step 4: Simplify right side
    28,572.95x = 334,147,446.43
  5. Step 5: Solve for x
    x = 334,147,446.43/28,572.95
  6. Step 6: Final answer
    x = 11,694.54

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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.