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Finding the Fourth Proportional to 20,330.76, 30,648.52 and 18,976.04

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Solution

The fourth proportional to 20,330.76, 30,648.52 and 18,976.04 is: 28,606.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,330.76 : 30,648.52 = 18,976.04 : x
  2. Step 2: Convert to fraction form
    20,330.76/30,648.52 = 18,976.04/x
  3. Step 3: Cross multiply
    20,330.76x = 30,648.52 × 18,976.04
  4. Step 4: Simplify right side
    20,330.76x = 581,587,541.46
  5. Step 5: Solve for x
    x = 581,587,541.46/20,330.76
  6. Step 6: Final answer
    x = 28,606.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.