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Finding the Fourth Proportional to 25,991.60, 38,922.60 and 20,807.60

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Solution

The fourth proportional to 25,991.60, 38,922.60 and 20,807.60 is: 31,159.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,991.60 : 38,922.60 = 20,807.60 : x
  2. Step 2: Convert to fraction form
    25,991.60/38,922.60 = 20,807.60/x
  3. Step 3: Cross multiply
    25,991.60x = 38,922.60 × 20,807.60
  4. Step 4: Simplify right side
    25,991.60x = 809,885,891.76
  5. Step 5: Solve for x
    x = 809,885,891.76/25,991.60
  6. Step 6: Final answer
    x = 31,159.52

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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.