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Finding the Fourth Proportional to 25,907.60, 38,861.40 and 20,723.60

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Solution

The fourth proportional to 25,907.60, 38,861.40 and 20,723.60 is: 31,085.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,907.60 : 38,861.40 = 20,723.60 : x
  2. Step 2: Convert to fraction form
    25,907.60/38,861.40 = 20,723.60/x
  3. Step 3: Cross multiply
    25,907.60x = 38,861.40 × 20,723.60
  4. Step 4: Simplify right side
    25,907.60x = 805,348,109.04
  5. Step 5: Solve for x
    x = 805,348,109.04/25,907.60
  6. Step 6: Final answer
    x = 31,085.40

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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.