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Finding the Fourth Proportional to 30,903.56, 42,631.22 and 19,553.93

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Solution

The fourth proportional to 30,903.56, 42,631.22 and 19,553.93 is: 26,974.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,903.56 : 42,631.22 = 19,553.93 : x
  2. Step 2: Convert to fraction form
    30,903.56/42,631.22 = 19,553.93/x
  3. Step 3: Cross multiply
    30,903.56x = 42,631.22 × 19,553.93
  4. Step 4: Simplify right side
    30,903.56x = 833,607,793.92
  5. Step 5: Solve for x
    x = 833,607,793.92/30,903.56
  6. Step 6: Final answer
    x = 26,974.49

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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.