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Finding the Fourth Proportional to 28,481.12, 42,720.08 and 7,703.04

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Solution

The fourth proportional to 28,481.12, 42,720.08 and 7,703.04 is: 11,554.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,481.12 : 42,720.08 = 7,703.04 : x
  2. Step 2: Convert to fraction form
    28,481.12/42,720.08 = 7,703.04/x
  3. Step 3: Cross multiply
    28,481.12x = 42,720.08 × 7,703.04
  4. Step 4: Simplify right side
    28,481.12x = 329,074,485.04
  5. Step 5: Solve for x
    x = 329,074,485.04/28,481.12
  6. Step 6: Final answer
    x = 11,554.13

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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.