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Finding the Fourth Proportional to 30,451.53, 42,020.42 and 17,021.01

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Solution

The fourth proportional to 30,451.53, 42,020.42 and 17,021.01 is: 23,487.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,451.53 : 42,020.42 = 17,021.01 : x
  2. Step 2: Convert to fraction form
    30,451.53/42,020.42 = 17,021.01/x
  3. Step 3: Cross multiply
    30,451.53x = 42,020.42 × 17,021.01
  4. Step 4: Simplify right side
    30,451.53x = 715,229,903.92
  5. Step 5: Solve for x
    x = 715,229,903.92/30,451.53
  6. Step 6: Final answer
    x = 23,487.49

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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.