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Finding the Fourth Proportional to 28,987.61, 43,479.94 and 16,986.54

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Solution

The fourth proportional to 28,987.61, 43,479.94 and 16,986.54 is: 25,478.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,987.61 : 43,479.94 = 16,986.54 : x
  2. Step 2: Convert to fraction form
    28,987.61/43,479.94 = 16,986.54/x
  3. Step 3: Cross multiply
    28,987.61x = 43,479.94 × 16,986.54
  4. Step 4: Simplify right side
    28,987.61x = 738,573,892.44
  5. Step 5: Solve for x
    x = 738,573,892.44/28,987.61
  6. Step 6: Final answer
    x = 25,478.96

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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.