Home / 21,015.76-31,526.04-6,977.68

Finding the Fourth Proportional to 21,015.76, 31,526.04 and 6,977.68

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Solution

The fourth proportional to 21,015.76, 31,526.04 and 6,977.68 is: 10,467.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,015.76 : 31,526.04 = 6,977.68 : x
  2. Step 2: Convert to fraction form
    21,015.76/31,526.04 = 6,977.68/x
  3. Step 3: Cross multiply
    21,015.76x = 31,526.04 × 6,977.68
  4. Step 4: Simplify right side
    21,015.76x = 219,978,618.79
  5. Step 5: Solve for x
    x = 219,978,618.79/21,015.76
  6. Step 6: Final answer
    x = 10,467.32

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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.