Home / 20,885.34-28,821.77-11,453.91

Finding the Fourth Proportional to 20,885.34, 28,821.77 and 11,453.91

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Solution

The fourth proportional to 20,885.34, 28,821.77 and 11,453.91 is: 15,806.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.34 : 28,821.77 = 11,453.91 : x
  2. Step 2: Convert to fraction form
    20,885.34/28,821.77 = 11,453.91/x
  3. Step 3: Cross multiply
    20,885.34x = 28,821.77 × 11,453.91
  4. Step 4: Simplify right side
    20,885.34x = 330,121,901.65
  5. Step 5: Solve for x
    x = 330,121,901.65/20,885.34
  6. Step 6: Final answer
    x = 15,806.39

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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.