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Finding the Fourth Proportional to 28,513.12, 42,771.84 and 7,738.24

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Solution

The fourth proportional to 28,513.12, 42,771.84 and 7,738.24 is: 11,607.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,513.12 : 42,771.84 = 7,738.24 : x
  2. Step 2: Convert to fraction form
    28,513.12/42,771.84 = 7,738.24/x
  3. Step 3: Cross multiply
    28,513.12x = 42,771.84 × 7,738.24
  4. Step 4: Simplify right side
    28,513.12x = 330,978,763.16
  5. Step 5: Solve for x
    x = 330,978,763.16/28,513.12
  6. Step 6: Final answer
    x = 11,607.95

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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.