Home / 28,137.96-38,831.40-15,562.80

Finding the Fourth Proportional to 28,137.96, 38,831.40 and 15,562.80

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Solution

The fourth proportional to 28,137.96, 38,831.40 and 15,562.80 is: 21,477.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137.96 : 38,831.40 = 15,562.80 : x
  2. Step 2: Convert to fraction form
    28,137.96/38,831.40 = 15,562.80/x
  3. Step 3: Cross multiply
    28,137.96x = 38,831.40 × 15,562.80
  4. Step 4: Simplify right side
    28,137.96x = 604,325,311.92
  5. Step 5: Solve for x
    x = 604,325,311.92/28,137.96
  6. Step 6: Final answer
    x = 21,477.23

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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.