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Finding the Fourth Proportional to 19,830.69, 29,671.92 and 19,609.29

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Solution

The fourth proportional to 19,830.69, 29,671.92 and 19,609.29 is: 29,340.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,830.69 : 29,671.92 = 19,609.29 : x
  2. Step 2: Convert to fraction form
    19,830.69/29,671.92 = 19,609.29/x
  3. Step 3: Cross multiply
    19,830.69x = 29,671.92 × 19,609.29
  4. Step 4: Simplify right side
    19,830.69x = 581,845,284.14
  5. Step 5: Solve for x
    x = 581,845,284.14/19,830.69
  6. Step 6: Final answer
    x = 29,340.65

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1.5x scale

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.