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Finding the Fourth Proportional to 28,909.80, 43,364.70 and 8,133.30

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Solution

The fourth proportional to 28,909.80, 43,364.70 and 8,133.30 is: 12,199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,909.80 : 43,364.70 = 8,133.30 : x
  2. Step 2: Convert to fraction form
    28,909.80/43,364.70 = 8,133.30/x
  3. Step 3: Cross multiply
    28,909.80x = 43,364.70 × 8,133.30
  4. Step 4: Simplify right side
    28,909.80x = 352,698,114.51
  5. Step 5: Solve for x
    x = 352,698,114.51/28,909.80
  6. Step 6: Final answer
    x = 12,199.95

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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.