Home / 5,160.12-7,120.98-2,802.30

Finding the Fourth Proportional to 5,160.12, 7,120.98 and 2,802.30

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Solution

The fourth proportional to 5,160.12, 7,120.98 and 2,802.30 is: 3,867.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,160.12 : 7,120.98 = 2,802.30 : x
  2. Step 2: Convert to fraction form
    5,160.12/7,120.98 = 2,802.30/x
  3. Step 3: Cross multiply
    5,160.12x = 7,120.98 × 2,802.30
  4. Step 4: Simplify right side
    5,160.12x = 19,955,122.25
  5. Step 5: Solve for x
    x = 19,955,122.25/5,160.12
  6. Step 6: Final answer
    x = 3,867.18

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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.