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Finding the Fourth Proportional to 25,509.60, 35,119.80 and 20,122.20

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Solution

The fourth proportional to 25,509.60, 35,119.80 and 20,122.20 is: 27,702.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,509.60 : 35,119.80 = 20,122.20 : x
  2. Step 2: Convert to fraction form
    25,509.60/35,119.80 = 20,122.20/x
  3. Step 3: Cross multiply
    25,509.60x = 35,119.80 × 20,122.20
  4. Step 4: Simplify right side
    25,509.60x = 706,687,639.56
  5. Step 5: Solve for x
    x = 706,687,639.56/25,509.60
  6. Step 6: Final answer
    x = 27,702.81

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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.