Home / 21,297.30-31,921.73-12,958.95

Finding the Fourth Proportional to 21,297.30, 31,921.73 and 12,958.95

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Solution

The fourth proportional to 21,297.30, 31,921.73 and 12,958.95 is: 19,423.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,297.30 : 31,921.73 = 12,958.95 : x
  2. Step 2: Convert to fraction form
    21,297.30/31,921.73 = 12,958.95/x
  3. Step 3: Cross multiply
    21,297.30x = 31,921.73 × 12,958.95
  4. Step 4: Simplify right side
    21,297.30x = 413,672,206.49
  5. Step 5: Solve for x
    x = 413,672,206.49/21,297.30
  6. Step 6: Final answer
    x = 19,423.70

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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.