Home / 21,431.52-29,575.71-11,871.69

Finding the Fourth Proportional to 21,431.52, 29,575.71 and 11,871.69

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Solution

The fourth proportional to 21,431.52, 29,575.71 and 11,871.69 is: 16,383.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,431.52 : 29,575.71 = 11,871.69 : x
  2. Step 2: Convert to fraction form
    21,431.52/29,575.71 = 11,871.69/x
  3. Step 3: Cross multiply
    21,431.52x = 29,575.71 × 11,871.69
  4. Step 4: Simplify right side
    21,431.52x = 351,113,660.65
  5. Step 5: Solve for x
    x = 351,113,660.65/21,431.52
  6. Step 6: Final answer
    x = 16,383.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.