Home / 20,365.23-28,102.60-11,290.51

Finding the Fourth Proportional to 20,365.23, 28,102.60 and 11,290.51

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Solution

The fourth proportional to 20,365.23, 28,102.60 and 11,290.51 is: 15,580.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.23 : 28,102.60 = 11,290.51 : x
  2. Step 2: Convert to fraction form
    20,365.23/28,102.60 = 11,290.51/x
  3. Step 3: Cross multiply
    20,365.23x = 28,102.60 × 11,290.51
  4. Step 4: Simplify right side
    20,365.23x = 317,292,654.49
  5. Step 5: Solve for x
    x = 317,292,654.49/20,365.23
  6. Step 6: Final answer
    x = 15,580.11

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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.