Home / 47,178.78-70,756.83-13,889.81

Finding the Fourth Proportional to 47,178.78, 70,756.83 and 13,889.81

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Solution

The fourth proportional to 47,178.78, 70,756.83 and 13,889.81 is: 20,831.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,178.78 : 70,756.83 = 13,889.81 : x
  2. Step 2: Convert to fraction form
    47,178.78/70,756.83 = 13,889.81/x
  3. Step 3: Cross multiply
    47,178.78x = 70,756.83 × 13,889.81
  4. Step 4: Simplify right side
    47,178.78x = 982,798,571.12
  5. Step 5: Solve for x
    x = 982,798,571.12/47,178.78
  6. Step 6: Final answer
    x = 20,831.37

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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.