Home / 20,712.33-28,583.35-11,280.89

Finding the Fourth Proportional to 20,712.33, 28,583.35 and 11,280.89

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Solution

The fourth proportional to 20,712.33, 28,583.35 and 11,280.89 is: 15,567.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.33 : 28,583.35 = 11,280.89 : x
  2. Step 2: Convert to fraction form
    20,712.33/28,583.35 = 11,280.89/x
  3. Step 3: Cross multiply
    20,712.33x = 28,583.35 × 11,280.89
  4. Step 4: Simplify right side
    20,712.33x = 322,445,670.44
  5. Step 5: Solve for x
    x = 322,445,670.44/20,712.33
  6. Step 6: Final answer
    x = 15,567.81

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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.