Home / 9,220.78-12,725.84-5,187.81

Finding the Fourth Proportional to 9,220.78, 12,725.84 and 5,187.81

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Solution

The fourth proportional to 9,220.78, 12,725.84 and 5,187.81 is: 7,159.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,220.78 : 12,725.84 = 5,187.81 : x
  2. Step 2: Convert to fraction form
    9,220.78/12,725.84 = 5,187.81/x
  3. Step 3: Cross multiply
    9,220.78x = 12,725.84 × 5,187.81
  4. Step 4: Simplify right side
    9,220.78x = 66,019,240.01
  5. Step 5: Solve for x
    x = 66,019,240.01/9,220.78
  6. Step 6: Final answer
    x = 7,159.83

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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.