Home / 19,997.40-30,006.90-8,311.80

Finding the Fourth Proportional to 19,997.40, 30,006.90 and 8,311.80

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Solution

The fourth proportional to 19,997.40, 30,006.90 and 8,311.80 is: 12,472.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,997.40 : 30,006.90 = 8,311.80 : x
  2. Step 2: Convert to fraction form
    19,997.40/30,006.90 = 8,311.80/x
  3. Step 3: Cross multiply
    19,997.40x = 30,006.90 × 8,311.80
  4. Step 4: Simplify right side
    19,997.40x = 249,411,351.42
  5. Step 5: Solve for x
    x = 249,411,351.42/19,997.40
  6. Step 6: Final answer
    x = 12,472.19

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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.