Home / 21,004.29-28,984.86-11,572.65

Finding the Fourth Proportional to 21,004.29, 28,984.86 and 11,572.65

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Solution

The fourth proportional to 21,004.29, 28,984.86 and 11,572.65 is: 15,969.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.29 : 28,984.86 = 11,572.65 : x
  2. Step 2: Convert to fraction form
    21,004.29/28,984.86 = 11,572.65/x
  3. Step 3: Cross multiply
    21,004.29x = 28,984.86 × 11,572.65
  4. Step 4: Simplify right side
    21,004.29x = 335,431,640.08
  5. Step 5: Solve for x
    x = 335,431,640.08/21,004.29
  6. Step 6: Final answer
    x = 15,969.67

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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.