Home / 15,853.55-21,878.15-9,138.03

Finding the Fourth Proportional to 15,853.55, 21,878.15 and 9,138.03

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Solution

The fourth proportional to 15,853.55, 21,878.15 and 9,138.03 is: 12,610.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.55 : 21,878.15 = 9,138.03 : x
  2. Step 2: Convert to fraction form
    15,853.55/21,878.15 = 9,138.03/x
  3. Step 3: Cross multiply
    15,853.55x = 21,878.15 × 9,138.03
  4. Step 4: Simplify right side
    15,853.55x = 199,923,145.35
  5. Step 5: Solve for x
    x = 199,923,145.35/15,853.55
  6. Step 6: Final answer
    x = 12,610.63

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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.