Home / 20,582.30-28,406.09-13,419.88

Finding the Fourth Proportional to 20,582.30, 28,406.09 and 13,419.88

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Solution

The fourth proportional to 20,582.30, 28,406.09 and 13,419.88 is: 18,521.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,582.30 : 28,406.09 = 13,419.88 : x
  2. Step 2: Convert to fraction form
    20,582.30/28,406.09 = 13,419.88/x
  3. Step 3: Cross multiply
    20,582.30x = 28,406.09 × 13,419.88
  4. Step 4: Simplify right side
    20,582.30x = 381,206,281.60
  5. Step 5: Solve for x
    x = 381,206,281.60/20,582.30
  6. Step 6: Final answer
    x = 18,521.07

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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.