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Finding the Fourth Proportional to 25,455.25, 35,128.25 and 15,519.25

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Solution

The fourth proportional to 25,455.25, 35,128.25 and 15,519.25 is: 21,416.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,455.25 : 35,128.25 = 15,519.25 : x
  2. Step 2: Convert to fraction form
    25,455.25/35,128.25 = 15,519.25/x
  3. Step 3: Cross multiply
    25,455.25x = 35,128.25 × 15,519.25
  4. Step 4: Simplify right side
    25,455.25x = 545,164,093.81
  5. Step 5: Solve for x
    x = 545,164,093.81/25,455.25
  6. Step 6: Final answer
    x = 21,416.57

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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.