Home / 2,802.81-3,867.78-1,543.85

Finding the Fourth Proportional to 2,802.81, 3,867.78 and 1,543.85

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Solution

The fourth proportional to 2,802.81, 3,867.78 and 1,543.85 is: 2,130.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,802.81 : 3,867.78 = 1,543.85 : x
  2. Step 2: Convert to fraction form
    2,802.81/3,867.78 = 1,543.85/x
  3. Step 3: Cross multiply
    2,802.81x = 3,867.78 × 1,543.85
  4. Step 4: Simplify right side
    2,802.81x = 5,971,272.15
  5. Step 5: Solve for x
    x = 5,971,272.15/2,802.81
  6. Step 6: Final answer
    x = 2,130.46

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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.