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Finding the Fourth Proportional to 8,633.70, 11,915.65 and 6,401.93

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Solution

The fourth proportional to 8,633.70, 11,915.65 and 6,401.93 is: 8,835.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,633.70 : 11,915.65 = 6,401.93 : x
  2. Step 2: Convert to fraction form
    8,633.70/11,915.65 = 6,401.93/x
  3. Step 3: Cross multiply
    8,633.70x = 11,915.65 × 6,401.93
  4. Step 4: Simplify right side
    8,633.70x = 76,283,139.52
  5. Step 5: Solve for x
    x = 76,283,139.52/8,633.70
  6. Step 6: Final answer
    x = 8,835.51

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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.