Home / 20,712-28,582.62-11,280.57

Finding the Fourth Proportional to 20,712, 28,582.62 and 11,280.57

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Solution

The fourth proportional to 20,712, 28,582.62 and 11,280.57 is: 15,567.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712 : 28,582.62 = 11,280.57 : x
  2. Step 2: Convert to fraction form
    20,712/28,582.62 = 11,280.57/x
  3. Step 3: Cross multiply
    20,712x = 28,582.62 × 11,280.57
  4. Step 4: Simplify right side
    20,712x = 322,428,245.69
  5. Step 5: Solve for x
    x = 322,428,245.69/20,712
  6. Step 6: Final answer
    x = 15,567.22

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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.