Home / 20,344.80-28,074.27-11,390.25

Finding the Fourth Proportional to 20,344.80, 28,074.27 and 11,390.25

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Solution

The fourth proportional to 20,344.80, 28,074.27 and 11,390.25 is: 15,717.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,344.80 : 28,074.27 = 11,390.25 : x
  2. Step 2: Convert to fraction form
    20,344.80/28,074.27 = 11,390.25/x
  3. Step 3: Cross multiply
    20,344.80x = 28,074.27 × 11,390.25
  4. Step 4: Simplify right side
    20,344.80x = 319,772,953.87
  5. Step 5: Solve for x
    x = 319,772,953.87/20,344.80
  6. Step 6: Final answer
    x = 15,717.67

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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.