Home / 21,216.36-31,824.30-12,898.68

Finding the Fourth Proportional to 21,216.36, 31,824.30 and 12,898.68

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Solution

The fourth proportional to 21,216.36, 31,824.30 and 12,898.68 is: 19,347.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,216.36 : 31,824.30 = 12,898.68 : x
  2. Step 2: Convert to fraction form
    21,216.36/31,824.30 = 12,898.68/x
  3. Step 3: Cross multiply
    21,216.36x = 31,824.30 × 12,898.68
  4. Step 4: Simplify right side
    21,216.36x = 410,491,461.92
  5. Step 5: Solve for x
    x = 410,491,461.92/21,216.36
  6. Step 6: Final answer
    x = 19,347.87

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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.