Home / 30,651.82-42,303.42-18,712.60

Finding the Fourth Proportional to 30,651.82, 42,303.42 and 18,712.60

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Solution

The fourth proportional to 30,651.82, 42,303.42 and 18,712.60 is: 25,825.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,651.82 : 42,303.42 = 18,712.60 : x
  2. Step 2: Convert to fraction form
    30,651.82/42,303.42 = 18,712.60/x
  3. Step 3: Cross multiply
    30,651.82x = 42,303.42 × 18,712.60
  4. Step 4: Simplify right side
    30,651.82x = 791,606,977.09
  5. Step 5: Solve for x
    x = 791,606,977.09/30,651.82
  6. Step 6: Final answer
    x = 25,825.77

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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.