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Finding the Fourth Proportional to 28,878.96, 43,319.97 and 9,159.06

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Solution

The fourth proportional to 28,878.96, 43,319.97 and 9,159.06 is: 13,739.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,878.96 : 43,319.97 = 9,159.06 : x
  2. Step 2: Convert to fraction form
    28,878.96/43,319.97 = 9,159.06/x
  3. Step 3: Cross multiply
    28,878.96x = 43,319.97 × 9,159.06
  4. Step 4: Simplify right side
    28,878.96x = 396,770,204.43
  5. Step 5: Solve for x
    x = 396,770,204.43/28,878.96
  6. Step 6: Final answer
    x = 13,739.08

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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.