Home / 21,209.82-31,784.64-15,619.32

Finding the Fourth Proportional to 21,209.82, 31,784.64 and 15,619.32

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Solution

The fourth proportional to 21,209.82, 31,784.64 and 15,619.32 is: 23,406.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.82 : 31,784.64 = 15,619.32 : x
  2. Step 2: Convert to fraction form
    21,209.82/31,784.64 = 15,619.32/x
  3. Step 3: Cross multiply
    21,209.82x = 31,784.64 × 15,619.32
  4. Step 4: Simplify right side
    21,209.82x = 496,454,463.24
  5. Step 5: Solve for x
    x = 496,454,463.24/21,209.82
  6. Step 6: Final answer
    x = 23,406.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.