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Finding the Fourth Proportional to 9,653.78, 13,315.35 and 8,859.67

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Solution

The fourth proportional to 9,653.78, 13,315.35 and 8,859.67 is: 12,220.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,653.78 : 13,315.35 = 8,859.67 : x
  2. Step 2: Convert to fraction form
    9,653.78/13,315.35 = 8,859.67/x
  3. Step 3: Cross multiply
    9,653.78x = 13,315.35 × 8,859.67
  4. Step 4: Simplify right side
    9,653.78x = 117,969,640.22
  5. Step 5: Solve for x
    x = 117,969,640.22/9,653.78
  6. Step 6: Final answer
    x = 12,220.04

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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.