Home / 9,418.14-12,996.45-5,385.39

Finding the Fourth Proportional to 9,418.14, 12,996.45 and 5,385.39

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Solution

The fourth proportional to 9,418.14, 12,996.45 and 5,385.39 is: 7,431.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,418.14 : 12,996.45 = 5,385.39 : x
  2. Step 2: Convert to fraction form
    9,418.14/12,996.45 = 5,385.39/x
  3. Step 3: Cross multiply
    9,418.14x = 12,996.45 × 5,385.39
  4. Step 4: Simplify right side
    9,418.14x = 69,990,903.13
  5. Step 5: Solve for x
    x = 69,990,903.13/9,418.14
  6. Step 6: Final answer
    x = 7,431.50

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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.