Home / 21,349.48-31,974.96-20,611.36

Finding the Fourth Proportional to 21,349.48, 31,974.96 and 20,611.36

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Solution

The fourth proportional to 21,349.48, 31,974.96 and 20,611.36 is: 30,869.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,349.48 : 31,974.96 = 20,611.36 : x
  2. Step 2: Convert to fraction form
    21,349.48/31,974.96 = 20,611.36/x
  3. Step 3: Cross multiply
    21,349.48x = 31,974.96 × 20,611.36
  4. Step 4: Simplify right side
    21,349.48x = 659,047,411.55
  5. Step 5: Solve for x
    x = 659,047,411.55/21,349.48
  6. Step 6: Final answer
    x = 30,869.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.