Home / 28,340.94-39,110.53-15,765.69

Finding the Fourth Proportional to 28,340.94, 39,110.53 and 15,765.69

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Solution

The fourth proportional to 28,340.94, 39,110.53 and 15,765.69 is: 21,756.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,340.94 : 39,110.53 = 15,765.69 : x
  2. Step 2: Convert to fraction form
    28,340.94/39,110.53 = 15,765.69/x
  3. Step 3: Cross multiply
    28,340.94x = 39,110.53 × 15,765.69
  4. Step 4: Simplify right side
    28,340.94x = 616,604,408.53
  5. Step 5: Solve for x
    x = 616,604,408.53/28,340.94
  6. Step 6: Final answer
    x = 21,756.67

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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.