Home / 20,639.47-28,472.69-13,927.26

Finding the Fourth Proportional to 20,639.47, 28,472.69 and 13,927.26

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Solution

The fourth proportional to 20,639.47, 28,472.69 and 13,927.26 is: 19,213.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.47 : 28,472.69 = 13,927.26 : x
  2. Step 2: Convert to fraction form
    20,639.47/28,472.69 = 13,927.26/x
  3. Step 3: Cross multiply
    20,639.47x = 28,472.69 × 13,927.26
  4. Step 4: Simplify right side
    20,639.47x = 396,546,558.85
  5. Step 5: Solve for x
    x = 396,546,558.85/20,639.47
  6. Step 6: Final answer
    x = 19,213.02

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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.