Home / 20,580.96-28,401.75-11,149.50

Finding the Fourth Proportional to 20,580.96, 28,401.75 and 11,149.50

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Solution

The fourth proportional to 20,580.96, 28,401.75 and 11,149.50 is: 15,386.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.96 : 28,401.75 = 11,149.50 : x
  2. Step 2: Convert to fraction form
    20,580.96/28,401.75 = 11,149.50/x
  3. Step 3: Cross multiply
    20,580.96x = 28,401.75 × 11,149.50
  4. Step 4: Simplify right side
    20,580.96x = 316,665,311.63
  5. Step 5: Solve for x
    x = 316,665,311.63/20,580.96
  6. Step 6: Final answer
    x = 15,386.32

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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.