Home / 7,830.32-11,740.24-4,128.64

Finding the Fourth Proportional to 7,830.32, 11,740.24 and 4,128.64

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Solution

The fourth proportional to 7,830.32, 11,740.24 and 4,128.64 is: 6,190.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,830.32 : 11,740.24 = 4,128.64 : x
  2. Step 2: Convert to fraction form
    7,830.32/11,740.24 = 4,128.64/x
  3. Step 3: Cross multiply
    7,830.32x = 11,740.24 × 4,128.64
  4. Step 4: Simplify right side
    7,830.32x = 48,471,224.47
  5. Step 5: Solve for x
    x = 48,471,224.47/7,830.32
  6. Step 6: Final answer
    x = 6,190.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.