Home / 28,712.64-39,631.24-18,640.52

Finding the Fourth Proportional to 28,712.64, 39,631.24 and 18,640.52

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Solution

The fourth proportional to 28,712.64, 39,631.24 and 18,640.52 is: 25,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,712.64 : 39,631.24 = 18,640.52 : x
  2. Step 2: Convert to fraction form
    28,712.64/39,631.24 = 18,640.52/x
  3. Step 3: Cross multiply
    28,712.64x = 39,631.24 × 18,640.52
  4. Step 4: Simplify right side
    28,712.64x = 738,746,921.84
  5. Step 5: Solve for x
    x = 738,746,921.84/28,712.64
  6. Step 6: Final answer
    x = 25,728.98

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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.