Home / 21,257.97-31,868.45-8,770.20

Finding the Fourth Proportional to 21,257.97, 31,868.45 and 8,770.20

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Solution

The fourth proportional to 21,257.97, 31,868.45 and 8,770.20 is: 13,147.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,257.97 : 31,868.45 = 8,770.20 : x
  2. Step 2: Convert to fraction form
    21,257.97/31,868.45 = 8,770.20/x
  3. Step 3: Cross multiply
    21,257.97x = 31,868.45 × 8,770.20
  4. Step 4: Simplify right side
    21,257.97x = 279,492,680.19
  5. Step 5: Solve for x
    x = 279,492,680.19/21,257.97
  6. Step 6: Final answer
    x = 13,147.67

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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.