Home / 27,985.55-38,622.78-20,899.67

Finding the Fourth Proportional to 27,985.55, 38,622.78 and 20,899.67

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Solution

The fourth proportional to 27,985.55, 38,622.78 and 20,899.67 is: 28,843.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,985.55 : 38,622.78 = 20,899.67 : x
  2. Step 2: Convert to fraction form
    27,985.55/38,622.78 = 20,899.67/x
  3. Step 3: Cross multiply
    27,985.55x = 38,622.78 × 20,899.67
  4. Step 4: Simplify right side
    27,985.55x = 807,203,163.37
  5. Step 5: Solve for x
    x = 807,203,163.37/27,985.55
  6. Step 6: Final answer
    x = 28,843.57

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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.