Home / 28,140.62-38,812.42-19,640.02

Finding the Fourth Proportional to 28,140.62, 38,812.42 and 19,640.02

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Solution

The fourth proportional to 28,140.62, 38,812.42 and 19,640.02 is: 27,088.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,140.62 : 38,812.42 = 19,640.02 : x
  2. Step 2: Convert to fraction form
    28,140.62/38,812.42 = 19,640.02/x
  3. Step 3: Cross multiply
    28,140.62x = 38,812.42 × 19,640.02
  4. Step 4: Simplify right side
    28,140.62x = 762,276,594.87
  5. Step 5: Solve for x
    x = 762,276,594.87/28,140.62
  6. Step 6: Final answer
    x = 27,088.13

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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.