Home / 7,485.75-10,330.18-4,128.66

Finding the Fourth Proportional to 7,485.75, 10,330.18 and 4,128.66

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Solution

The fourth proportional to 7,485.75, 10,330.18 and 4,128.66 is: 5,697.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,485.75 : 10,330.18 = 4,128.66 : x
  2. Step 2: Convert to fraction form
    7,485.75/10,330.18 = 4,128.66/x
  3. Step 3: Cross multiply
    7,485.75x = 10,330.18 × 4,128.66
  4. Step 4: Simplify right side
    7,485.75x = 42,649,749.31
  5. Step 5: Solve for x
    x = 42,649,749.31/7,485.75
  6. Step 6: Final answer
    x = 5,697.46

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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.