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Finding the Fourth Proportional to 9,520.64, 13,144.32 and 7,539.20

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Solution

The fourth proportional to 9,520.64, 13,144.32 and 7,539.20 is: 10,408.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,520.64 : 13,144.32 = 7,539.20 : x
  2. Step 2: Convert to fraction form
    9,520.64/13,144.32 = 7,539.20/x
  3. Step 3: Cross multiply
    9,520.64x = 13,144.32 × 7,539.20
  4. Step 4: Simplify right side
    9,520.64x = 99,097,657.34
  5. Step 5: Solve for x
    x = 99,097,657.34/9,520.64
  6. Step 6: Final answer
    x = 10,408.72

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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.