Home / 20,784.89-28,683.18-11,353.46

Finding the Fourth Proportional to 20,784.89, 28,683.18 and 11,353.46

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Solution

The fourth proportional to 20,784.89, 28,683.18 and 11,353.46 is: 15,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,784.89 : 28,683.18 = 11,353.46 : x
  2. Step 2: Convert to fraction form
    20,784.89/28,683.18 = 11,353.46/x
  3. Step 3: Cross multiply
    20,784.89x = 28,683.18 × 11,353.46
  4. Step 4: Simplify right side
    20,784.89x = 325,653,136.62
  5. Step 5: Solve for x
    x = 325,653,136.62/20,784.89
  6. Step 6: Final answer
    x = 15,667.78

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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.