Home / 21,303.53-31,919.97-12,958.30

Finding the Fourth Proportional to 21,303.53, 31,919.97 and 12,958.30

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Solution

The fourth proportional to 21,303.53, 31,919.97 and 12,958.30 is: 19,415.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,303.53 : 31,919.97 = 12,958.30 : x
  2. Step 2: Convert to fraction form
    21,303.53/31,919.97 = 12,958.30/x
  3. Step 3: Cross multiply
    21,303.53x = 31,919.97 × 12,958.30
  4. Step 4: Simplify right side
    21,303.53x = 413,628,387.65
  5. Step 5: Solve for x
    x = 413,628,387.65/21,303.53
  6. Step 6: Final answer
    x = 19,415.96

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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.