Home / 20,587.56-28,408.56-11,635.05

Finding the Fourth Proportional to 20,587.56, 28,408.56 and 11,635.05

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Solution

The fourth proportional to 20,587.56, 28,408.56 and 11,635.05 is: 16,055.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,587.56 : 28,408.56 = 11,635.05 : x
  2. Step 2: Convert to fraction form
    20,587.56/28,408.56 = 11,635.05/x
  3. Step 3: Cross multiply
    20,587.56x = 28,408.56 × 11,635.05
  4. Step 4: Simplify right side
    20,587.56x = 330,535,016.03
  5. Step 5: Solve for x
    x = 330,535,016.03/20,587.56
  6. Step 6: Final answer
    x = 16,055.08

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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.