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Finding the Fourth Proportional to 9,669.11, 13,343.22 and 5,420.16

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Solution

The fourth proportional to 9,669.11, 13,343.22 and 5,420.16 is: 7,479.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,669.11 : 13,343.22 = 5,420.16 : x
  2. Step 2: Convert to fraction form
    9,669.11/13,343.22 = 5,420.16/x
  3. Step 3: Cross multiply
    9,669.11x = 13,343.22 × 5,420.16
  4. Step 4: Simplify right side
    9,669.11x = 72,322,387.32
  5. Step 5: Solve for x
    x = 72,322,387.32/9,669.11
  6. Step 6: Final answer
    x = 7,479.74

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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.