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Finding the Fourth Proportional to 11,881.55, 16,396.28 and 6,503.99

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Solution

The fourth proportional to 11,881.55, 16,396.28 and 6,503.99 is: 8,975.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,881.55 : 16,396.28 = 6,503.99 : x
  2. Step 2: Convert to fraction form
    11,881.55/16,396.28 = 6,503.99/x
  3. Step 3: Cross multiply
    11,881.55x = 16,396.28 × 6,503.99
  4. Step 4: Simplify right side
    11,881.55x = 106,641,151.05
  5. Step 5: Solve for x
    x = 106,641,151.05/11,881.55
  6. Step 6: Final answer
    x = 8,975.35

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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.