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Finding the Fourth Proportional to 9,668.62, 13,343.63 and 5,420.40

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Solution

The fourth proportional to 9,668.62, 13,343.63 and 5,420.40 is: 7,480.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,668.62 : 13,343.63 = 5,420.40 : x
  2. Step 2: Convert to fraction form
    9,668.62/13,343.63 = 5,420.40/x
  3. Step 3: Cross multiply
    9,668.62x = 13,343.63 × 5,420.40
  4. Step 4: Simplify right side
    9,668.62x = 72,327,812.05
  5. Step 5: Solve for x
    x = 72,327,812.05/9,668.62
  6. Step 6: Final answer
    x = 7,480.68

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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.