Home / 20,643.29-28,487.58-11,211.92

Finding the Fourth Proportional to 20,643.29, 28,487.58 and 11,211.92

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Solution

The fourth proportional to 20,643.29, 28,487.58 and 11,211.92 is: 15,472.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.29 : 28,487.58 = 11,211.92 : x
  2. Step 2: Convert to fraction form
    20,643.29/28,487.58 = 11,211.92/x
  3. Step 3: Cross multiply
    20,643.29x = 28,487.58 × 11,211.92
  4. Step 4: Simplify right side
    20,643.29x = 319,400,453.37
  5. Step 5: Solve for x
    x = 319,400,453.37/20,643.29
  6. Step 6: Final answer
    x = 15,472.36

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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.