Home / 20,409.31-28,164.86-11,459.71

Finding the Fourth Proportional to 20,409.31, 28,164.86 and 11,459.71

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Solution

The fourth proportional to 20,409.31, 28,164.86 and 11,459.71 is: 15,814.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.31 : 28,164.86 = 11,459.71 : x
  2. Step 2: Convert to fraction form
    20,409.31/28,164.86 = 11,459.71/x
  3. Step 3: Cross multiply
    20,409.31x = 28,164.86 × 11,459.71
  4. Step 4: Simplify right side
    20,409.31x = 322,761,127.79
  5. Step 5: Solve for x
    x = 322,761,127.79/20,409.31
  6. Step 6: Final answer
    x = 15,814.41

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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.