Home / 7,111.45-9,811.23-4,125.64

Finding the Fourth Proportional to 7,111.45, 9,811.23 and 4,125.64

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Solution

The fourth proportional to 7,111.45, 9,811.23 and 4,125.64 is: 5,691.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,111.45 : 9,811.23 = 4,125.64 : x
  2. Step 2: Convert to fraction form
    7,111.45/9,811.23 = 4,125.64/x
  3. Step 3: Cross multiply
    7,111.45x = 9,811.23 × 4,125.64
  4. Step 4: Simplify right side
    7,111.45x = 40,477,602.94
  5. Step 5: Solve for x
    x = 40,477,602.94/7,111.45
  6. Step 6: Final answer
    x = 5,691.89

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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.