Home / 39,289.86-54,218.70-21,384.54

Finding the Fourth Proportional to 39,289.86, 54,218.70 and 21,384.54

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Solution

The fourth proportional to 39,289.86, 54,218.70 and 21,384.54 is: 29,509.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,289.86 : 54,218.70 = 21,384.54 : x
  2. Step 2: Convert to fraction form
    39,289.86/54,218.70 = 21,384.54/x
  3. Step 3: Cross multiply
    39,289.86x = 54,218.70 × 21,384.54
  4. Step 4: Simplify right side
    39,289.86x = 1,159,441,958.90
  5. Step 5: Solve for x
    x = 1,159,441,958.90/39,289.86
  6. Step 6: Final answer
    x = 29,509.95

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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.