Home / 21,240.84-31,862.34-8,090.76

Finding the Fourth Proportional to 21,240.84, 31,862.34 and 8,090.76

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Solution

The fourth proportional to 21,240.84, 31,862.34 and 8,090.76 is: 12,136.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,240.84 : 31,862.34 = 8,090.76 : x
  2. Step 2: Convert to fraction form
    21,240.84/31,862.34 = 8,090.76/x
  3. Step 3: Cross multiply
    21,240.84x = 31,862.34 × 8,090.76
  4. Step 4: Simplify right side
    21,240.84x = 257,790,545.98
  5. Step 5: Solve for x
    x = 257,790,545.98/21,240.84
  6. Step 6: Final answer
    x = 12,136.55

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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.