Home / 21,985.87-30,338.07-12,424.75

Finding the Fourth Proportional to 21,985.87, 30,338.07 and 12,424.75

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Solution

The fourth proportional to 21,985.87, 30,338.07 and 12,424.75 is: 17,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.87 : 30,338.07 = 12,424.75 : x
  2. Step 2: Convert to fraction form
    21,985.87/30,338.07 = 12,424.75/x
  3. Step 3: Cross multiply
    21,985.87x = 30,338.07 × 12,424.75
  4. Step 4: Simplify right side
    21,985.87x = 376,942,935.23
  5. Step 5: Solve for x
    x = 376,942,935.23/21,985.87
  6. Step 6: Final answer
    x = 17,144.78

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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.