Home / 20,376.29-28,119.75-11,423.36

Finding the Fourth Proportional to 20,376.29, 28,119.75 and 11,423.36

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Solution

The fourth proportional to 20,376.29, 28,119.75 and 11,423.36 is: 15,764.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.29 : 28,119.75 = 11,423.36 : x
  2. Step 2: Convert to fraction form
    20,376.29/28,119.75 = 11,423.36/x
  3. Step 3: Cross multiply
    20,376.29x = 28,119.75 × 11,423.36
  4. Step 4: Simplify right side
    20,376.29x = 321,222,027.36
  5. Step 5: Solve for x
    x = 321,222,027.36/20,376.29
  6. Step 6: Final answer
    x = 15,764.50

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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.