Home / 21,438.35-32,158.79-8,290.79

Finding the Fourth Proportional to 21,438.35, 32,158.79 and 8,290.79

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Solution

The fourth proportional to 21,438.35, 32,158.79 and 8,290.79 is: 12,436.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.35 : 32,158.79 = 8,290.79 : x
  2. Step 2: Convert to fraction form
    21,438.35/32,158.79 = 8,290.79/x
  3. Step 3: Cross multiply
    21,438.35x = 32,158.79 × 8,290.79
  4. Step 4: Simplify right side
    21,438.35x = 266,621,774.54
  5. Step 5: Solve for x
    x = 266,621,774.54/21,438.35
  6. Step 6: Final answer
    x = 12,436.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.