Home / 7,128.87-10,697.16-2,971.74

Finding the Fourth Proportional to 7,128.87, 10,697.16 and 2,971.74

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Solution

The fourth proportional to 7,128.87, 10,697.16 and 2,971.74 is: 4,459.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.87 : 10,697.16 = 2,971.74 : x
  2. Step 2: Convert to fraction form
    7,128.87/10,697.16 = 2,971.74/x
  3. Step 3: Cross multiply
    7,128.87x = 10,697.16 × 2,971.74
  4. Step 4: Simplify right side
    7,128.87x = 31,789,178.26
  5. Step 5: Solve for x
    x = 31,789,178.26/7,128.87
  6. Step 6: Final answer
    x = 4,459.22

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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.