Home / 20,788.89-28,688.67-11,357.45

Finding the Fourth Proportional to 20,788.89, 28,688.67 and 11,357.45

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Solution

The fourth proportional to 20,788.89, 28,688.67 and 11,357.45 is: 15,673.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.89 : 28,688.67 = 11,357.45 : x
  2. Step 2: Convert to fraction form
    20,788.89/28,688.67 = 11,357.45/x
  3. Step 3: Cross multiply
    20,788.89x = 28,688.67 × 11,357.45
  4. Step 4: Simplify right side
    20,788.89x = 325,830,135.09
  5. Step 5: Solve for x
    x = 325,830,135.09/20,788.89
  6. Step 6: Final answer
    x = 15,673.28

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1.5x scale

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.