Home / 20,750.76-28,636.29-11,319.48

Finding the Fourth Proportional to 20,750.76, 28,636.29 and 11,319.48

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Solution

The fourth proportional to 20,750.76, 28,636.29 and 11,319.48 is: 15,621.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,750.76 : 28,636.29 = 11,319.48 : x
  2. Step 2: Convert to fraction form
    20,750.76/28,636.29 = 11,319.48/x
  3. Step 3: Cross multiply
    20,750.76x = 28,636.29 × 11,319.48
  4. Step 4: Simplify right side
    20,750.76x = 324,147,911.93
  5. Step 5: Solve for x
    x = 324,147,911.93/20,750.76
  6. Step 6: Final answer
    x = 15,621.01

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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.