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Finding the Fourth Proportional to 28,991.69, 43,493.72 and 9,000.74

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Solution

The fourth proportional to 28,991.69, 43,493.72 and 9,000.74 is: 13,503.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.69 : 43,493.72 = 9,000.74 : x
  2. Step 2: Convert to fraction form
    28,991.69/43,493.72 = 9,000.74/x
  3. Step 3: Cross multiply
    28,991.69x = 43,493.72 × 9,000.74
  4. Step 4: Simplify right side
    28,991.69x = 391,475,402.88
  5. Step 5: Solve for x
    x = 391,475,402.88/28,991.69
  6. Step 6: Final answer
    x = 13,503.02

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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.