Home / 7,120.86-10,681.29-2,679.36

Finding the Fourth Proportional to 7,120.86, 10,681.29 and 2,679.36

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Solution

The fourth proportional to 7,120.86, 10,681.29 and 2,679.36 is: 4,019.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,120.86 : 10,681.29 = 2,679.36 : x
  2. Step 2: Convert to fraction form
    7,120.86/10,681.29 = 2,679.36/x
  3. Step 3: Cross multiply
    7,120.86x = 10,681.29 × 2,679.36
  4. Step 4: Simplify right side
    7,120.86x = 28,619,021.17
  5. Step 5: Solve for x
    x = 28,619,021.17/7,120.86
  6. Step 6: Final answer
    x = 4,019.04

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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.