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Finding the Fourth Proportional to 52,693.69, 78,987.15 and 18,949.66

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Solution

The fourth proportional to 52,693.69, 78,987.15 and 18,949.66 is: 28,405.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,693.69 : 78,987.15 = 18,949.66 : x
  2. Step 2: Convert to fraction form
    52,693.69/78,987.15 = 18,949.66/x
  3. Step 3: Cross multiply
    52,693.69x = 78,987.15 × 18,949.66
  4. Step 4: Simplify right side
    52,693.69x = 1,496,779,636.87
  5. Step 5: Solve for x
    x = 1,496,779,636.87/52,693.69
  6. Step 6: Final answer
    x = 28,405.29

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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.