Home / 28,911.66-43,334.46-13,128.72

Finding the Fourth Proportional to 28,911.66, 43,334.46 and 13,128.72

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Solution

The fourth proportional to 28,911.66, 43,334.46 and 13,128.72 is: 19,678.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,911.66 : 43,334.46 = 13,128.72 : x
  2. Step 2: Convert to fraction form
    28,911.66/43,334.46 = 13,128.72/x
  3. Step 3: Cross multiply
    28,911.66x = 43,334.46 × 13,128.72
  4. Step 4: Simplify right side
    28,911.66x = 568,925,991.69
  5. Step 5: Solve for x
    x = 568,925,991.69/28,911.66
  6. Step 6: Final answer
    x = 19,678.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.