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Finding the Fourth Proportional to 25,810.87, 35,621.36 and 15,739.87

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Solution

The fourth proportional to 25,810.87, 35,621.36 and 15,739.87 is: 21,722.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,810.87 : 35,621.36 = 15,739.87 : x
  2. Step 2: Convert to fraction form
    25,810.87/35,621.36 = 15,739.87/x
  3. Step 3: Cross multiply
    25,810.87x = 35,621.36 × 15,739.87
  4. Step 4: Simplify right side
    25,810.87x = 560,675,575.62
  5. Step 5: Solve for x
    x = 560,675,575.62/25,810.87
  6. Step 6: Final answer
    x = 21,722.46

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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.