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Finding the Fourth Proportional to 28,352.92, 39,133.96 and 21,966.88

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Solution

The fourth proportional to 28,352.92, 39,133.96 and 21,966.88 is: 30,319.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,352.92 : 39,133.96 = 21,966.88 : x
  2. Step 2: Convert to fraction form
    28,352.92/39,133.96 = 21,966.88/x
  3. Step 3: Cross multiply
    28,352.92x = 39,133.96 × 21,966.88
  4. Step 4: Simplify right side
    28,352.92x = 859,651,003.24
  5. Step 5: Solve for x
    x = 859,651,003.24/28,352.92
  6. Step 6: Final answer
    x = 30,319.66

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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.