Home / 20,580.76-28,401.70-11,149.56

Finding the Fourth Proportional to 20,580.76, 28,401.70 and 11,149.56

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Solution

The fourth proportional to 20,580.76, 28,401.70 and 11,149.56 is: 15,386.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.76 : 28,401.70 = 11,149.56 : x
  2. Step 2: Convert to fraction form
    20,580.76/28,401.70 = 11,149.56/x
  3. Step 3: Cross multiply
    20,580.76x = 28,401.70 × 11,149.56
  4. Step 4: Simplify right side
    20,580.76x = 316,666,458.25
  5. Step 5: Solve for x
    x = 316,666,458.25/20,580.76
  6. Step 6: Final answer
    x = 15,386.53

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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.