Home / 21,299.56-31,925.09-12,961.22

Finding the Fourth Proportional to 21,299.56, 31,925.09 and 12,961.22

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Solution

The fourth proportional to 21,299.56, 31,925.09 and 12,961.22 is: 19,427.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,299.56 : 31,925.09 = 12,961.22 : x
  2. Step 2: Convert to fraction form
    21,299.56/31,925.09 = 12,961.22/x
  3. Step 3: Cross multiply
    21,299.56x = 31,925.09 × 12,961.22
  4. Step 4: Simplify right side
    21,299.56x = 413,787,987.79
  5. Step 5: Solve for x
    x = 413,787,987.79/21,299.56
  6. Step 6: Final answer
    x = 19,427.07

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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.