Home / 5,160.31-7,121.12-2,802.47

Finding the Fourth Proportional to 5,160.31, 7,121.12 and 2,802.47

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Solution

The fourth proportional to 5,160.31, 7,121.12 and 2,802.47 is: 3,867.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.31 : 7,121.12 = 2,802.47 : x
  2. Step 2: Convert to fraction form
    5,160.31/7,121.12 = 2,802.47/x
  3. Step 3: Cross multiply
    5,160.31x = 7,121.12 × 2,802.47
  4. Step 4: Simplify right side
    5,160.31x = 19,956,675.55
  5. Step 5: Solve for x
    x = 19,956,675.55/5,160.31
  6. Step 6: Final answer
    x = 3,867.34

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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.