Home / 20,788.31-28,688.48-11,357.48

Finding the Fourth Proportional to 20,788.31, 28,688.48 and 11,357.48

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Solution

The fourth proportional to 20,788.31, 28,688.48 and 11,357.48 is: 15,673.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.31 : 28,688.48 = 11,357.48 : x
  2. Step 2: Convert to fraction form
    20,788.31/28,688.48 = 11,357.48/x
  3. Step 3: Cross multiply
    20,788.31x = 28,688.48 × 11,357.48
  4. Step 4: Simplify right side
    20,788.31x = 325,828,895.35
  5. Step 5: Solve for x
    x = 325,828,895.35/20,788.31
  6. Step 6: Final answer
    x = 15,673.66

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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.