Home / 9,378.37-12,941.67-5,128.61

Finding the Fourth Proportional to 9,378.37, 12,941.67 and 5,128.61

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Solution

The fourth proportional to 9,378.37, 12,941.67 and 5,128.61 is: 7,077.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.37 : 12,941.67 = 5,128.61 : x
  2. Step 2: Convert to fraction form
    9,378.37/12,941.67 = 5,128.61/x
  3. Step 3: Cross multiply
    9,378.37x = 12,941.67 × 5,128.61
  4. Step 4: Simplify right side
    9,378.37x = 66,372,700.65
  5. Step 5: Solve for x
    x = 66,372,700.65/9,378.37
  6. Step 6: Final answer
    x = 7,077.21

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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.