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Finding the Fourth Proportional to 9,352.80, 12,909.60 and 5,376.60

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Solution

The fourth proportional to 9,352.80, 12,909.60 and 5,376.60 is: 7,421.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,352.80 : 12,909.60 = 5,376.60 : x
  2. Step 2: Convert to fraction form
    9,352.80/12,909.60 = 5,376.60/x
  3. Step 3: Cross multiply
    9,352.80x = 12,909.60 × 5,376.60
  4. Step 4: Simplify right side
    9,352.80x = 69,409,755.36
  5. Step 5: Solve for x
    x = 69,409,755.36/9,352.80
  6. Step 6: Final answer
    x = 7,421.28

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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.