Home / 28,857.52-39,829.60-18,240.40

Finding the Fourth Proportional to 28,857.52, 39,829.60 and 18,240.40

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Solution

The fourth proportional to 28,857.52, 39,829.60 and 18,240.40 is: 25,175.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,857.52 : 39,829.60 = 18,240.40 : x
  2. Step 2: Convert to fraction form
    28,857.52/39,829.60 = 18,240.40/x
  3. Step 3: Cross multiply
    28,857.52x = 39,829.60 × 18,240.40
  4. Step 4: Simplify right side
    28,857.52x = 726,507,835.84
  5. Step 5: Solve for x
    x = 726,507,835.84/28,857.52
  6. Step 6: Final answer
    x = 25,175.69

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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.