Home / 20,664.29-28,516.50-11,232.78

Finding the Fourth Proportional to 20,664.29, 28,516.50 and 11,232.78

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Solution

The fourth proportional to 20,664.29, 28,516.50 and 11,232.78 is: 15,501.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,664.29 : 28,516.50 = 11,232.78 : x
  2. Step 2: Convert to fraction form
    20,664.29/28,516.50 = 11,232.78/x
  3. Step 3: Cross multiply
    20,664.29x = 28,516.50 × 11,232.78
  4. Step 4: Simplify right side
    20,664.29x = 320,319,570.87
  5. Step 5: Solve for x
    x = 320,319,570.87/20,664.29
  6. Step 6: Final answer
    x = 15,501.12

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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.