Home / 5,160.03-7,120.78-2,802.19

Finding the Fourth Proportional to 5,160.03, 7,120.78 and 2,802.19

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Solution

The fourth proportional to 5,160.03, 7,120.78 and 2,802.19 is: 3,866.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.03 : 7,120.78 = 2,802.19 : x
  2. Step 2: Convert to fraction form
    5,160.03/7,120.78 = 2,802.19/x
  3. Step 3: Cross multiply
    5,160.03x = 7,120.78 × 2,802.19
  4. Step 4: Simplify right side
    5,160.03x = 19,953,728.89
  5. Step 5: Solve for x
    x = 19,953,728.89/5,160.03
  6. Step 6: Final answer
    x = 3,866.98

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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.