Home / 30,168.61-41,640.76-18,831.28

Finding the Fourth Proportional to 30,168.61, 41,640.76 and 18,831.28

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Solution

The fourth proportional to 30,168.61, 41,640.76 and 18,831.28 is: 25,992.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,168.61 : 41,640.76 = 18,831.28 : x
  2. Step 2: Convert to fraction form
    30,168.61/41,640.76 = 18,831.28/x
  3. Step 3: Cross multiply
    30,168.61x = 41,640.76 × 18,831.28
  4. Step 4: Simplify right side
    30,168.61x = 784,148,810.97
  5. Step 5: Solve for x
    x = 784,148,810.97/30,168.61
  6. Step 6: Final answer
    x = 25,992.21

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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.