Home / 5,160.65-7,121.74-2,802.79

Finding the Fourth Proportional to 5,160.65, 7,121.74 and 2,802.79

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Solution

The fourth proportional to 5,160.65, 7,121.74 and 2,802.79 is: 3,867.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.65 : 7,121.74 = 2,802.79 : x
  2. Step 2: Convert to fraction form
    5,160.65/7,121.74 = 2,802.79/x
  3. Step 3: Cross multiply
    5,160.65x = 7,121.74 × 2,802.79
  4. Step 4: Simplify right side
    5,160.65x = 19,960,741.65
  5. Step 5: Solve for x
    x = 19,960,741.65/5,160.65
  6. Step 6: Final answer
    x = 3,867.87

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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.