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Finding the Fourth Proportional to 19,382.40, 29,030.40 and 16,790.40

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Solution

The fourth proportional to 19,382.40, 29,030.40 and 16,790.40 is: 25,148.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,382.40 : 29,030.40 = 16,790.40 : x
  2. Step 2: Convert to fraction form
    19,382.40/29,030.40 = 16,790.40/x
  3. Step 3: Cross multiply
    19,382.40x = 29,030.40 × 16,790.40
  4. Step 4: Simplify right side
    19,382.40x = 487,432,028.16
  5. Step 5: Solve for x
    x = 487,432,028.16/19,382.40
  6. Step 6: Final answer
    x = 25,148.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.