Home / 20,718.36-28,582.74-11,758.50

Finding the Fourth Proportional to 20,718.36, 28,582.74 and 11,758.50

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Solution

The fourth proportional to 20,718.36, 28,582.74 and 11,758.50 is: 16,221.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.36 : 28,582.74 = 11,758.50 : x
  2. Step 2: Convert to fraction form
    20,718.36/28,582.74 = 11,758.50/x
  3. Step 3: Cross multiply
    20,718.36x = 28,582.74 × 11,758.50
  4. Step 4: Simplify right side
    20,718.36x = 336,090,148.29
  5. Step 5: Solve for x
    x = 336,090,148.29/20,718.36
  6. Step 6: Final answer
    x = 16,221.85

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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.