Home / 21,003,940.96-28,990,831.56-13,680,024.64

Finding the Fourth Proportional to 21,003,940.96, 28,990,831.56 and 13,680,024.64

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Solution

The fourth proportional to 21,003,940.96, 28,990,831.56 and 13,680,024.64 is: 18,881,946.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003,940.96 : 28,990,831.56 = 13,680,024.64 : x
  2. Step 2: Convert to fraction form
    21,003,940.96/28,990,831.56 = 13,680,024.64/x
  3. Step 3: Cross multiply
    21,003,940.96x = 28,990,831.56 × 13,680,024.64
  4. Step 4: Simplify right side
    21,003,940.96x = 396,595,290,074,889.62
  5. Step 5: Solve for x
    x = 396,595,290,074,889.62/21,003,940.96
  6. Step 6: Final answer
    x = 18,881,946.53

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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.