Home / 20,989.16-28,967.09-15,674.75

Finding the Fourth Proportional to 20,989.16, 28,967.09 and 15,674.75

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Solution

The fourth proportional to 20,989.16, 28,967.09 and 15,674.75 is: 21,632.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,989.16 : 28,967.09 = 15,674.75 : x
  2. Step 2: Convert to fraction form
    20,989.16/28,967.09 = 15,674.75/x
  3. Step 3: Cross multiply
    20,989.16x = 28,967.09 × 15,674.75
  4. Step 4: Simplify right side
    20,989.16x = 454,051,779.39
  5. Step 5: Solve for x
    x = 454,051,779.39/20,989.16
  6. Step 6: Final answer
    x = 21,632.68

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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.