Home / 9,378.84-12,942.90-5,400.36

Finding the Fourth Proportional to 9,378.84, 12,942.90 and 5,400.36

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Solution

The fourth proportional to 9,378.84, 12,942.90 and 5,400.36 is: 7,452.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.84 : 12,942.90 = 5,400.36 : x
  2. Step 2: Convert to fraction form
    9,378.84/12,942.90 = 5,400.36/x
  3. Step 3: Cross multiply
    9,378.84x = 12,942.90 × 5,400.36
  4. Step 4: Simplify right side
    9,378.84x = 69,896,319.44
  5. Step 5: Solve for x
    x = 69,896,319.44/9,378.84
  6. Step 6: Final answer
    x = 7,452.55

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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.