Home / 20,438.96-28,207.06-11,365.34

Finding the Fourth Proportional to 20,438.96, 28,207.06 and 11,365.34

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Solution

The fourth proportional to 20,438.96, 28,207.06 and 11,365.34 is: 15,684.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.96 : 28,207.06 = 11,365.34 : x
  2. Step 2: Convert to fraction form
    20,438.96/28,207.06 = 11,365.34/x
  3. Step 3: Cross multiply
    20,438.96x = 28,207.06 × 11,365.34
  4. Step 4: Simplify right side
    20,438.96x = 320,582,827.30
  5. Step 5: Solve for x
    x = 320,582,827.30/20,438.96
  6. Step 6: Final answer
    x = 15,684.89

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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.