Home / 21,271.63-31,912.08-8,127.76

Finding the Fourth Proportional to 21,271.63, 31,912.08 and 8,127.76

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Solution

The fourth proportional to 21,271.63, 31,912.08 and 8,127.76 is: 12,193.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.63 : 31,912.08 = 8,127.76 : x
  2. Step 2: Convert to fraction form
    21,271.63/31,912.08 = 8,127.76/x
  3. Step 3: Cross multiply
    21,271.63x = 31,912.08 × 8,127.76
  4. Step 4: Simplify right side
    21,271.63x = 259,373,727.34
  5. Step 5: Solve for x
    x = 259,373,727.34/21,271.63
  6. Step 6: Final answer
    x = 12,193.41

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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.