Home / 5,160.07-7,120.81-2,802.16

Finding the Fourth Proportional to 5,160.07, 7,120.81 and 2,802.16

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Solution

The fourth proportional to 5,160.07, 7,120.81 and 2,802.16 is: 3,866.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.07 : 7,120.81 = 2,802.16 : x
  2. Step 2: Convert to fraction form
    5,160.07/7,120.81 = 2,802.16/x
  3. Step 3: Cross multiply
    5,160.07x = 7,120.81 × 2,802.16
  4. Step 4: Simplify right side
    5,160.07x = 19,953,648.95
  5. Step 5: Solve for x
    x = 19,953,648.95/5,160.07
  6. Step 6: Final answer
    x = 3,866.93

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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.