Home / 20,890.29-28,827-11,458.83

Finding the Fourth Proportional to 20,890.29, 28,827 and 11,458.83

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Solution

The fourth proportional to 20,890.29, 28,827 and 11,458.83 is: 15,812.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.29 : 28,827 = 11,458.83 : x
  2. Step 2: Convert to fraction form
    20,890.29/28,827 = 11,458.83/x
  3. Step 3: Cross multiply
    20,890.29x = 28,827 × 11,458.83
  4. Step 4: Simplify right side
    20,890.29x = 330,323,692.41
  5. Step 5: Solve for x
    x = 330,323,692.41/20,890.29
  6. Step 6: Final answer
    x = 15,812.31

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1.5x scale

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.