Home / 15,290.40-21,105.24-9,986.04

Finding the Fourth Proportional to 15,290.40, 21,105.24 and 9,986.04

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Solution

The fourth proportional to 15,290.40, 21,105.24 and 9,986.04 is: 13,783.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,290.40 : 21,105.24 = 9,986.04 : x
  2. Step 2: Convert to fraction form
    15,290.40/21,105.24 = 9,986.04/x
  3. Step 3: Cross multiply
    15,290.40x = 21,105.24 × 9,986.04
  4. Step 4: Simplify right side
    15,290.40x = 210,757,770.85
  5. Step 5: Solve for x
    x = 210,757,770.85/15,290.40
  6. Step 6: Final answer
    x = 13,783.67

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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.