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Finding the Fourth Proportional to 38,600.80, 53,270.06 and 21,604.90

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Solution

The fourth proportional to 38,600.80, 53,270.06 and 21,604.90 is: 29,815.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,600.80 : 53,270.06 = 21,604.90 : x
  2. Step 2: Convert to fraction form
    38,600.80/53,270.06 = 21,604.90/x
  3. Step 3: Cross multiply
    38,600.80x = 53,270.06 × 21,604.90
  4. Step 4: Simplify right side
    38,600.80x = 1,150,894,319.29
  5. Step 5: Solve for x
    x = 1,150,894,319.29/38,600.80
  6. Step 6: Final answer
    x = 29,815.30

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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.