Home / 2,831.47-3,907.64-1,712.45

Finding the Fourth Proportional to 2,831.47, 3,907.64 and 1,712.45

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Solution

The fourth proportional to 2,831.47, 3,907.64 and 1,712.45 is: 2,363.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,831.47 : 3,907.64 = 1,712.45 : x
  2. Step 2: Convert to fraction form
    2,831.47/3,907.64 = 1,712.45/x
  3. Step 3: Cross multiply
    2,831.47x = 3,907.64 × 1,712.45
  4. Step 4: Simplify right side
    2,831.47x = 6,691,638.12
  5. Step 5: Solve for x
    x = 6,691,638.12/2,831.47
  6. Step 6: Final answer
    x = 2,363.31

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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.