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Finding the Fourth Proportional to 8,478.60, 11,706.26 and 5,296.74

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Solution

The fourth proportional to 8,478.60, 11,706.26 and 5,296.74 is: 7,313.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.60 : 11,706.26 = 5,296.74 : x
  2. Step 2: Convert to fraction form
    8,478.60/11,706.26 = 5,296.74/x
  3. Step 3: Cross multiply
    8,478.60x = 11,706.26 × 5,296.74
  4. Step 4: Simplify right side
    8,478.60x = 62,004,965.07
  5. Step 5: Solve for x
    x = 62,004,965.07/8,478.60
  6. Step 6: Final answer
    x = 7,313.12

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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.