Home / 31,355.84-46,970.58-20,831.78

Finding the Fourth Proportional to 31,355.84, 46,970.58 and 20,831.78

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Solution

The fourth proportional to 31,355.84, 46,970.58 and 20,831.78 is: 31,205.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,355.84 : 46,970.58 = 20,831.78 : x
  2. Step 2: Convert to fraction form
    31,355.84/46,970.58 = 20,831.78/x
  3. Step 3: Cross multiply
    31,355.84x = 46,970.58 × 20,831.78
  4. Step 4: Simplify right side
    31,355.84x = 978,480,789.03
  5. Step 5: Solve for x
    x = 978,480,789.03/31,355.84
  6. Step 6: Final answer
    x = 31,205.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.