Home / 20,376.72-28,119.88-11,424.24

Finding the Fourth Proportional to 20,376.72, 28,119.88 and 11,424.24

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Solution

The fourth proportional to 20,376.72, 28,119.88 and 11,424.24 is: 15,765.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.72 : 28,119.88 = 11,424.24 : x
  2. Step 2: Convert to fraction form
    20,376.72/28,119.88 = 11,424.24/x
  3. Step 3: Cross multiply
    20,376.72x = 28,119.88 × 11,424.24
  4. Step 4: Simplify right side
    20,376.72x = 321,248,299.63
  5. Step 5: Solve for x
    x = 321,248,299.63/20,376.72
  6. Step 6: Final answer
    x = 15,765.45

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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.