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Finding the Fourth Proportional to 29,574.90, 40,819.95 and 18,817.70

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Solution

The fourth proportional to 29,574.90, 40,819.95 and 18,817.70 is: 25,972.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,574.90 : 40,819.95 = 18,817.70 : x
  2. Step 2: Convert to fraction form
    29,574.90/40,819.95 = 18,817.70/x
  3. Step 3: Cross multiply
    29,574.90x = 40,819.95 × 18,817.70
  4. Step 4: Simplify right side
    29,574.90x = 768,137,369.02
  5. Step 5: Solve for x
    x = 768,137,369.02/29,574.90
  6. Step 6: Final answer
    x = 25,972.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.