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Finding the Fourth Proportional to 28,203.52, 38,910.72 and 17,021.44

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Solution

The fourth proportional to 28,203.52, 38,910.72 and 17,021.44 is: 23,483.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,203.52 : 38,910.72 = 17,021.44 : x
  2. Step 2: Convert to fraction form
    28,203.52/38,910.72 = 17,021.44/x
  3. Step 3: Cross multiply
    28,203.52x = 38,910.72 × 17,021.44
  4. Step 4: Simplify right side
    28,203.52x = 662,316,485.84
  5. Step 5: Solve for x
    x = 662,316,485.84/28,203.52
  6. Step 6: Final answer
    x = 23,483.47

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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.