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Finding the Fourth Proportional to 22,312.70, 30,790.62 and 13,354.94

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Solution

The fourth proportional to 22,312.70, 30,790.62 and 13,354.94 is: 18,429.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,312.70 : 30,790.62 = 13,354.94 : x
  2. Step 2: Convert to fraction form
    22,312.70/30,790.62 = 13,354.94/x
  3. Step 3: Cross multiply
    22,312.70x = 30,790.62 × 13,354.94
  4. Step 4: Simplify right side
    22,312.70x = 411,206,882.66
  5. Step 5: Solve for x
    x = 411,206,882.66/22,312.70
  6. Step 6: Final answer
    x = 18,429.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.