Home / 20,788.52-28,686.66-11,355.08

Finding the Fourth Proportional to 20,788.52, 28,686.66 and 11,355.08

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Solution

The fourth proportional to 20,788.52, 28,686.66 and 11,355.08 is: 15,669.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.52 : 28,686.66 = 11,355.08 : x
  2. Step 2: Convert to fraction form
    20,788.52/28,686.66 = 11,355.08/x
  3. Step 3: Cross multiply
    20,788.52x = 28,686.66 × 11,355.08
  4. Step 4: Simplify right side
    20,788.52x = 325,739,319.23
  5. Step 5: Solve for x
    x = 325,739,319.23/20,788.52
  6. Step 6: Final answer
    x = 15,669.19

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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.