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Finding the Fourth Proportional to 28,957.70, 39,959.24 and 17,021.54

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Solution

The fourth proportional to 28,957.70, 39,959.24 and 17,021.54 is: 23,488.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,957.70 : 39,959.24 = 17,021.54 : x
  2. Step 2: Convert to fraction form
    28,957.70/39,959.24 = 17,021.54/x
  3. Step 3: Cross multiply
    28,957.70x = 39,959.24 × 17,021.54
  4. Step 4: Simplify right side
    28,957.70x = 680,167,802.03
  5. Step 5: Solve for x
    x = 680,167,802.03/28,957.70
  6. Step 6: Final answer
    x = 23,488.32

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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.