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Finding the Fourth Proportional to 9,520, 13,137.60 and 5,328.28

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Solution

The fourth proportional to 9,520, 13,137.60 and 5,328.28 is: 7,353.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,520 : 13,137.60 = 5,328.28 : x
  2. Step 2: Convert to fraction form
    9,520/13,137.60 = 5,328.28/x
  3. Step 3: Cross multiply
    9,520x = 13,137.60 × 5,328.28
  4. Step 4: Simplify right side
    9,520x = 70,000,811.33
  5. Step 5: Solve for x
    x = 70,000,811.33/9,520
  6. Step 6: Final answer
    x = 7,353.03

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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.