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Finding the Fourth Proportional to 8,809.70, 12,158.64 and 5,453.60

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Solution

The fourth proportional to 8,809.70, 12,158.64 and 5,453.60 is: 7,526.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,809.70 : 12,158.64 = 5,453.60 : x
  2. Step 2: Convert to fraction form
    8,809.70/12,158.64 = 5,453.60/x
  3. Step 3: Cross multiply
    8,809.70x = 12,158.64 × 5,453.60
  4. Step 4: Simplify right side
    8,809.70x = 66,308,359.10
  5. Step 5: Solve for x
    x = 66,308,359.10/8,809.70
  6. Step 6: Final answer
    x = 7,526.74

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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.