Home / 20,403.05-28,155.48-11,450.93

Finding the Fourth Proportional to 20,403.05, 28,155.48 and 11,450.93

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Solution

The fourth proportional to 20,403.05, 28,155.48 and 11,450.93 is: 15,801.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.05 : 28,155.48 = 11,450.93 : x
  2. Step 2: Convert to fraction form
    20,403.05/28,155.48 = 11,450.93/x
  3. Step 3: Cross multiply
    20,403.05x = 28,155.48 × 11,450.93
  4. Step 4: Simplify right side
    20,403.05x = 322,406,430.60
  5. Step 5: Solve for x
    x = 322,406,430.60/20,403.05
  6. Step 6: Final answer
    x = 15,801.87

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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.