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Finding the Fourth Proportional to 20,685.60, 31,029.60 and 5,895.60

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Solution

The fourth proportional to 20,685.60, 31,029.60 and 5,895.60 is: 8,843.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,685.60 : 31,029.60 = 5,895.60 : x
  2. Step 2: Convert to fraction form
    20,685.60/31,029.60 = 5,895.60/x
  3. Step 3: Cross multiply
    20,685.60x = 31,029.60 × 5,895.60
  4. Step 4: Simplify right side
    20,685.60x = 182,938,109.76
  5. Step 5: Solve for x
    x = 182,938,109.76/20,685.60
  6. Step 6: Final answer
    x = 8,843.74

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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.