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Finding the Fourth Proportional to 9,390.44, 12,960.18 and 5,411.45

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Solution

The fourth proportional to 9,390.44, 12,960.18 and 5,411.45 is: 7,468.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,390.44 : 12,960.18 = 5,411.45 : x
  2. Step 2: Convert to fraction form
    9,390.44/12,960.18 = 5,411.45/x
  3. Step 3: Cross multiply
    9,390.44x = 12,960.18 × 5,411.45
  4. Step 4: Simplify right side
    9,390.44x = 70,133,301.26
  5. Step 5: Solve for x
    x = 70,133,301.26/9,390.44
  6. Step 6: Final answer
    x = 7,468.59

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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.