Home / 7,845-10,831.58-5,490.33

Finding the Fourth Proportional to 7,845, 10,831.58 and 5,490.33

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Solution

The fourth proportional to 7,845, 10,831.58 and 5,490.33 is: 7,580.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,845 : 10,831.58 = 5,490.33 : x
  2. Step 2: Convert to fraction form
    7,845/10,831.58 = 5,490.33/x
  3. Step 3: Cross multiply
    7,845x = 10,831.58 × 5,490.33
  4. Step 4: Simplify right side
    7,845x = 59,468,921.17
  5. Step 5: Solve for x
    x = 59,468,921.17/7,845
  6. Step 6: Final answer
    x = 7,580.49

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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.