Home / 21,316.52-31,977.69-7,272.77

Finding the Fourth Proportional to 21,316.52, 31,977.69 and 7,272.77

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Solution

The fourth proportional to 21,316.52, 31,977.69 and 7,272.77 is: 10,910.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,316.52 : 31,977.69 = 7,272.77 : x
  2. Step 2: Convert to fraction form
    21,316.52/31,977.69 = 7,272.77/x
  3. Step 3: Cross multiply
    21,316.52x = 31,977.69 × 7,272.77
  4. Step 4: Simplify right side
    21,316.52x = 232,566,464.45
  5. Step 5: Solve for x
    x = 232,566,464.45/21,316.52
  6. Step 6: Final answer
    x = 10,910.15

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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.