Home / 15,853.74-21,873.15-9,138.42

Finding the Fourth Proportional to 15,853.74, 21,873.15 and 9,138.42

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Solution

The fourth proportional to 15,853.74, 21,873.15 and 9,138.42 is: 12,608.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.74 : 21,873.15 = 9,138.42 : x
  2. Step 2: Convert to fraction form
    15,853.74/21,873.15 = 9,138.42/x
  3. Step 3: Cross multiply
    15,853.74x = 21,873.15 × 9,138.42
  4. Step 4: Simplify right side
    15,853.74x = 199,886,031.42
  5. Step 5: Solve for x
    x = 199,886,031.42/15,853.74
  6. Step 6: Final answer
    x = 12,608.13

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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.