Home / 21,005.42-31,511.32-7,151.18

Finding the Fourth Proportional to 21,005.42, 31,511.32 and 7,151.18

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Solution

The fourth proportional to 21,005.42, 31,511.32 and 7,151.18 is: 10,727.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,005.42 : 31,511.32 = 7,151.18 : x
  2. Step 2: Convert to fraction form
    21,005.42/31,511.32 = 7,151.18/x
  3. Step 3: Cross multiply
    21,005.42x = 31,511.32 × 7,151.18
  4. Step 4: Simplify right side
    21,005.42x = 225,343,121.36
  5. Step 5: Solve for x
    x = 225,343,121.36/21,005.42
  6. Step 6: Final answer
    x = 10,727.86

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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.