Home / 7,128.74-10,632.36-6,682.21

Finding the Fourth Proportional to 7,128.74, 10,632.36 and 6,682.21

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Solution

The fourth proportional to 7,128.74, 10,632.36 and 6,682.21 is: 9,966.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.74 : 10,632.36 = 6,682.21 : x
  2. Step 2: Convert to fraction form
    7,128.74/10,632.36 = 6,682.21/x
  3. Step 3: Cross multiply
    7,128.74x = 10,632.36 × 6,682.21
  4. Step 4: Simplify right side
    7,128.74x = 71,047,662.32
  5. Step 5: Solve for x
    x = 71,047,662.32/7,128.74
  6. Step 6: Final answer
    x = 9,966.37

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.