Home / 20,328.71-28,052.96-11,375.99

Finding the Fourth Proportional to 20,328.71, 28,052.96 and 11,375.99

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Solution

The fourth proportional to 20,328.71, 28,052.96 and 11,375.99 is: 15,698.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,328.71 : 28,052.96 = 11,375.99 : x
  2. Step 2: Convert to fraction form
    20,328.71/28,052.96 = 11,375.99/x
  3. Step 3: Cross multiply
    20,328.71x = 28,052.96 × 11,375.99
  4. Step 4: Simplify right side
    20,328.71x = 319,129,995.29
  5. Step 5: Solve for x
    x = 319,129,995.29/20,328.71
  6. Step 6: Final answer
    x = 15,698.49

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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.