Home / 30,019.86-45,013.59-21,271.86

Finding the Fourth Proportional to 30,019.86, 45,013.59 and 21,271.86

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Solution

The fourth proportional to 30,019.86, 45,013.59 and 21,271.86 is: 31,896.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,019.86 : 45,013.59 = 21,271.86 : x
  2. Step 2: Convert to fraction form
    30,019.86/45,013.59 = 21,271.86/x
  3. Step 3: Cross multiply
    30,019.86x = 45,013.59 × 21,271.86
  4. Step 4: Simplify right side
    30,019.86x = 957,522,784.58
  5. Step 5: Solve for x
    x = 957,522,784.58/30,019.86
  6. Step 6: Final answer
    x = 31,896.31

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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.