Home / 28,168.74-38,831.46-21,442.65

Finding the Fourth Proportional to 28,168.74, 38,831.46 and 21,442.65

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Solution

The fourth proportional to 28,168.74, 38,831.46 and 21,442.65 is: 29,559.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,168.74 : 38,831.46 = 21,442.65 : x
  2. Step 2: Convert to fraction form
    28,168.74/38,831.46 = 21,442.65/x
  3. Step 3: Cross multiply
    28,168.74x = 38,831.46 × 21,442.65
  4. Step 4: Simplify right side
    28,168.74x = 832,649,405.77
  5. Step 5: Solve for x
    x = 832,649,405.77/28,168.74
  6. Step 6: Final answer
    x = 29,559.34

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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.