Home / 20,885.04-28,821.15-11,453.58

Finding the Fourth Proportional to 20,885.04, 28,821.15 and 11,453.58

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Solution

The fourth proportional to 20,885.04, 28,821.15 and 11,453.58 is: 15,805.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.04 : 28,821.15 = 11,453.58 : x
  2. Step 2: Convert to fraction form
    20,885.04/28,821.15 = 11,453.58/x
  3. Step 3: Cross multiply
    20,885.04x = 28,821.15 × 11,453.58
  4. Step 4: Simplify right side
    20,885.04x = 330,105,347.22
  5. Step 5: Solve for x
    x = 330,105,347.22/20,885.04
  6. Step 6: Final answer
    x = 15,805.83

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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.