Home / 21,007.35-31,511.03-18,415.35

Finding the Fourth Proportional to 21,007.35, 31,511.03 and 18,415.35

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Solution

The fourth proportional to 21,007.35, 31,511.03 and 18,415.35 is: 27,623.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.35 : 31,511.03 = 18,415.35 : x
  2. Step 2: Convert to fraction form
    21,007.35/31,511.03 = 18,415.35/x
  3. Step 3: Cross multiply
    21,007.35x = 31,511.03 × 18,415.35
  4. Step 4: Simplify right side
    21,007.35x = 580,286,554.23
  5. Step 5: Solve for x
    x = 580,286,554.23/21,007.35
  6. Step 6: Final answer
    x = 27,623.03

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Similar ratio
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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.