Home / 20,941.12-28,899.36-11,509.76

Finding the Fourth Proportional to 20,941.12, 28,899.36 and 11,509.76

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Solution

The fourth proportional to 20,941.12, 28,899.36 and 11,509.76 is: 15,883.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,941.12 : 28,899.36 = 11,509.76 : x
  2. Step 2: Convert to fraction form
    20,941.12/28,899.36 = 11,509.76/x
  3. Step 3: Cross multiply
    20,941.12x = 28,899.36 × 11,509.76
  4. Step 4: Simplify right side
    20,941.12x = 332,624,697.75
  5. Step 5: Solve for x
    x = 332,624,697.75/20,941.12
  6. Step 6: Final answer
    x = 15,883.81

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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.