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Finding the Fourth Proportional to 28,829.80, 43,244.70 and 18,980.20

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Solution

The fourth proportional to 28,829.80, 43,244.70 and 18,980.20 is: 28,470.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,829.80 : 43,244.70 = 18,980.20 : x
  2. Step 2: Convert to fraction form
    28,829.80/43,244.70 = 18,980.20/x
  3. Step 3: Cross multiply
    28,829.80x = 43,244.70 × 18,980.20
  4. Step 4: Simplify right side
    28,829.80x = 820,793,054.94
  5. Step 5: Solve for x
    x = 820,793,054.94/28,829.80
  6. Step 6: Final answer
    x = 28,470.30

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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.