Home / 18,831.02-28,255.81-13,319.78

Finding the Fourth Proportional to 18,831.02, 28,255.81 and 13,319.78

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Solution

The fourth proportional to 18,831.02, 28,255.81 and 13,319.78 is: 19,986.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.02 : 28,255.81 = 13,319.78 : x
  2. Step 2: Convert to fraction form
    18,831.02/28,255.81 = 13,319.78/x
  3. Step 3: Cross multiply
    18,831.02x = 28,255.81 × 13,319.78
  4. Step 4: Simplify right side
    18,831.02x = 376,361,172.92
  5. Step 5: Solve for x
    x = 376,361,172.92/18,831.02
  6. Step 6: Final answer
    x = 19,986.23

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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.