Home / 28,578.40-42,837.83-11,948.09

Finding the Fourth Proportional to 28,578.40, 42,837.83 and 11,948.09

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Solution

The fourth proportional to 28,578.40, 42,837.83 and 11,948.09 is: 17,909.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.40 : 42,837.83 = 11,948.09 : x
  2. Step 2: Convert to fraction form
    28,578.40/42,837.83 = 11,948.09/x
  3. Step 3: Cross multiply
    28,578.40x = 42,837.83 × 11,948.09
  4. Step 4: Simplify right side
    28,578.40x = 511,830,019.12
  5. Step 5: Solve for x
    x = 511,830,019.12/28,578.40
  6. Step 6: Final answer
    x = 17,909.68

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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.