Home / 25,991.28-35,835.47-21,690.57

Finding the Fourth Proportional to 25,991.28, 35,835.47 and 21,690.57

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Solution

The fourth proportional to 25,991.28, 35,835.47 and 21,690.57 is: 29,905.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,991.28 : 35,835.47 = 21,690.57 : x
  2. Step 2: Convert to fraction form
    25,991.28/35,835.47 = 21,690.57/x
  3. Step 3: Cross multiply
    25,991.28x = 35,835.47 × 21,690.57
  4. Step 4: Simplify right side
    25,991.28x = 777,291,770.52
  5. Step 5: Solve for x
    x = 777,291,770.52/25,991.28
  6. Step 6: Final answer
    x = 29,905.87

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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.