Home / 28,231.81-38,960.09-15,657.37

Finding the Fourth Proportional to 28,231.81, 38,960.09 and 15,657.37

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Solution

The fourth proportional to 28,231.81, 38,960.09 and 15,657.37 is: 21,607.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,231.81 : 38,960.09 = 15,657.37 : x
  2. Step 2: Convert to fraction form
    28,231.81/38,960.09 = 15,657.37/x
  3. Step 3: Cross multiply
    28,231.81x = 38,960.09 × 15,657.37
  4. Step 4: Simplify right side
    28,231.81x = 610,012,427.39
  5. Step 5: Solve for x
    x = 610,012,427.39/28,231.81
  6. Step 6: Final answer
    x = 21,607.27

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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.