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Finding the Fourth Proportional to 28,636.80, 42,987.60 and 16,956.60

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Solution

The fourth proportional to 28,636.80, 42,987.60 and 16,956.60 is: 25,454.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,636.80 : 42,987.60 = 16,956.60 : x
  2. Step 2: Convert to fraction form
    28,636.80/42,987.60 = 16,956.60/x
  3. Step 3: Cross multiply
    28,636.80x = 42,987.60 × 16,956.60
  4. Step 4: Simplify right side
    28,636.80x = 728,923,538.16
  5. Step 5: Solve for x
    x = 728,923,538.16/28,636.80
  6. Step 6: Final answer
    x = 25,454.08

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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.