Home / 18,939.37-28,409.46-4,899.70

Finding the Fourth Proportional to 18,939.37, 28,409.46 and 4,899.70

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Solution

The fourth proportional to 18,939.37, 28,409.46 and 4,899.70 is: 7,349.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,939.37 : 28,409.46 = 4,899.70 : x
  2. Step 2: Convert to fraction form
    18,939.37/28,409.46 = 4,899.70/x
  3. Step 3: Cross multiply
    18,939.37x = 28,409.46 × 4,899.70
  4. Step 4: Simplify right side
    18,939.37x = 139,197,831.16
  5. Step 5: Solve for x
    x = 139,197,831.16/18,939.37
  6. Step 6: Final answer
    x = 7,349.65

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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.