Home / 15,228.98-21,009.43-8,855.09

Finding the Fourth Proportional to 15,228.98, 21,009.43 and 8,855.09

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Solution

The fourth proportional to 15,228.98, 21,009.43 and 8,855.09 is: 12,216.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,228.98 : 21,009.43 = 8,855.09 : x
  2. Step 2: Convert to fraction form
    15,228.98/21,009.43 = 8,855.09/x
  3. Step 3: Cross multiply
    15,228.98x = 21,009.43 × 8,855.09
  4. Step 4: Simplify right side
    15,228.98x = 186,040,393.50
  5. Step 5: Solve for x
    x = 186,040,393.50/15,228.98
  6. Step 6: Final answer
    x = 12,216.21

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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.