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Finding the Fourth Proportional to 18,425.76, 25,433 and 15,934.64

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Solution

The fourth proportional to 18,425.76, 25,433 and 15,934.64 is: 21,994.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,425.76 : 25,433 = 15,934.64 : x
  2. Step 2: Convert to fraction form
    18,425.76/25,433 = 15,934.64/x
  3. Step 3: Cross multiply
    18,425.76x = 25,433 × 15,934.64
  4. Step 4: Simplify right side
    18,425.76x = 405,265,699.12
  5. Step 5: Solve for x
    x = 405,265,699.12/18,425.76
  6. Step 6: Final answer
    x = 21,994.52

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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.