Home / 20,890.94-28,829.54-11,459.57

Finding the Fourth Proportional to 20,890.94, 28,829.54 and 11,459.57

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Solution

The fourth proportional to 20,890.94, 28,829.54 and 11,459.57 is: 15,814.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,890.94 : 28,829.54 = 11,459.57 : x
  2. Step 2: Convert to fraction form
    20,890.94/28,829.54 = 11,459.57/x
  3. Step 3: Cross multiply
    20,890.94x = 28,829.54 × 11,459.57
  4. Step 4: Simplify right side
    20,890.94x = 330,374,074.40
  5. Step 5: Solve for x
    x = 330,374,074.40/20,890.94
  6. Step 6: Final answer
    x = 15,814.23

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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.