Home / 7,111.35-9,812.09-4,125.45

Finding the Fourth Proportional to 7,111.35, 9,812.09 and 4,125.45

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Solution

The fourth proportional to 7,111.35, 9,812.09 and 4,125.45 is: 5,692.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.35 : 9,812.09 = 4,125.45 : x
  2. Step 2: Convert to fraction form
    7,111.35/9,812.09 = 4,125.45/x
  3. Step 3: Cross multiply
    7,111.35x = 9,812.09 × 4,125.45
  4. Step 4: Simplify right side
    7,111.35x = 40,479,319.58
  5. Step 5: Solve for x
    x = 40,479,319.58/7,111.35
  6. Step 6: Final answer
    x = 5,692.21

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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.