Home / 21,172.37-31,730.87-8,677.77

Finding the Fourth Proportional to 21,172.37, 31,730.87 and 8,677.77

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Solution

The fourth proportional to 21,172.37, 31,730.87 and 8,677.77 is: 13,005.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.37 : 31,730.87 = 8,677.77 : x
  2. Step 2: Convert to fraction form
    21,172.37/31,730.87 = 8,677.77/x
  3. Step 3: Cross multiply
    21,172.37x = 31,730.87 × 8,677.77
  4. Step 4: Simplify right side
    21,172.37x = 275,353,191.76
  5. Step 5: Solve for x
    x = 275,353,191.76/21,172.37
  6. Step 6: Final answer
    x = 13,005.31

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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.