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Finding the Fourth Proportional to 28,910.90, 43,329.90 and 14,087.90

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Solution

The fourth proportional to 28,910.90, 43,329.90 and 14,087.90 is: 21,114.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,910.90 : 43,329.90 = 14,087.90 : x
  2. Step 2: Convert to fraction form
    28,910.90/43,329.90 = 14,087.90/x
  3. Step 3: Cross multiply
    28,910.90x = 43,329.90 × 14,087.90
  4. Step 4: Simplify right side
    28,910.90x = 610,427,298.21
  5. Step 5: Solve for x
    x = 610,427,298.21/28,910.90
  6. Step 6: Final answer
    x = 21,114.09

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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.