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Finding the Fourth Proportional to 7,405.80, 11,116.80 and 4,635.60

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Solution

The fourth proportional to 7,405.80, 11,116.80 and 4,635.60 is: 6,958.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.80 : 11,116.80 = 4,635.60 : x
  2. Step 2: Convert to fraction form
    7,405.80/11,116.80 = 4,635.60/x
  3. Step 3: Cross multiply
    7,405.80x = 11,116.80 × 4,635.60
  4. Step 4: Simplify right side
    7,405.80x = 51,533,038.08
  5. Step 5: Solve for x
    x = 51,533,038.08/7,405.80
  6. Step 6: Final answer
    x = 6,958.47

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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.