Home / 20,747.79-28,631.93-11,316.38

Finding the Fourth Proportional to 20,747.79, 28,631.93 and 11,316.38

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Solution

The fourth proportional to 20,747.79, 28,631.93 and 11,316.38 is: 15,616.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,747.79 : 28,631.93 = 11,316.38 : x
  2. Step 2: Convert to fraction form
    20,747.79/28,631.93 = 11,316.38/x
  3. Step 3: Cross multiply
    20,747.79x = 28,631.93 × 11,316.38
  4. Step 4: Simplify right side
    20,747.79x = 324,009,600.27
  5. Step 5: Solve for x
    x = 324,009,600.27/20,747.79
  6. Step 6: Final answer
    x = 15,616.58

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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.