Home / 15,515.62-21,411.32-8,441.88

Finding the Fourth Proportional to 15,515.62, 21,411.32 and 8,441.88

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Solution

The fourth proportional to 15,515.62, 21,411.32 and 8,441.88 is: 11,649.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.62 : 21,411.32 = 8,441.88 : x
  2. Step 2: Convert to fraction form
    15,515.62/21,411.32 = 8,441.88/x
  3. Step 3: Cross multiply
    15,515.62x = 21,411.32 × 8,441.88
  4. Step 4: Simplify right side
    15,515.62x = 180,751,794.08
  5. Step 5: Solve for x
    x = 180,751,794.08/15,515.62
  6. Step 6: Final answer
    x = 11,649.67

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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.