Home / 20,995.92-28,974-11,564.40

Finding the Fourth Proportional to 20,995.92, 28,974 and 11,564.40

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Solution

The fourth proportional to 20,995.92, 28,974 and 11,564.40 is: 15,958.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.92 : 28,974 = 11,564.40 : x
  2. Step 2: Convert to fraction form
    20,995.92/28,974 = 11,564.40/x
  3. Step 3: Cross multiply
    20,995.92x = 28,974 × 11,564.40
  4. Step 4: Simplify right side
    20,995.92x = 335,066,925.60
  5. Step 5: Solve for x
    x = 335,066,925.60/20,995.92
  6. Step 6: Final answer
    x = 15,958.67

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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.