Home / 20,788.93-28,688.61-11,357.47

Finding the Fourth Proportional to 20,788.93, 28,688.61 and 11,357.47

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Solution

The fourth proportional to 20,788.93, 28,688.61 and 11,357.47 is: 15,673.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.93 : 28,688.61 = 11,357.47 : x
  2. Step 2: Convert to fraction form
    20,788.93/28,688.61 = 11,357.47/x
  3. Step 3: Cross multiply
    20,788.93x = 28,688.61 × 11,357.47
  4. Step 4: Simplify right side
    20,788.93x = 325,830,027.42
  5. Step 5: Solve for x
    x = 325,830,027.42/20,788.93
  6. Step 6: Final answer
    x = 15,673.25

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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.