Home / 7,389.78-11,074.80-2,705.40

Finding the Fourth Proportional to 7,389.78, 11,074.80 and 2,705.40

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Solution

The fourth proportional to 7,389.78, 11,074.80 and 2,705.40 is: 4,054.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,389.78 : 11,074.80 = 2,705.40 : x
  2. Step 2: Convert to fraction form
    7,389.78/11,074.80 = 2,705.40/x
  3. Step 3: Cross multiply
    7,389.78x = 11,074.80 × 2,705.40
  4. Step 4: Simplify right side
    7,389.78x = 29,961,763.92
  5. Step 5: Solve for x
    x = 29,961,763.92/7,389.78
  6. Step 6: Final answer
    x = 4,054.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.