Home / 30,379.32-45,491.08-21,006.42

Finding the Fourth Proportional to 30,379.32, 45,491.08 and 21,006.42

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Solution

The fourth proportional to 30,379.32, 45,491.08 and 21,006.42 is: 31,455.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,379.32 : 45,491.08 = 21,006.42 : x
  2. Step 2: Convert to fraction form
    30,379.32/45,491.08 = 21,006.42/x
  3. Step 3: Cross multiply
    30,379.32x = 45,491.08 × 21,006.42
  4. Step 4: Simplify right side
    30,379.32x = 955,604,732.73
  5. Step 5: Solve for x
    x = 955,604,732.73/30,379.32
  6. Step 6: Final answer
    x = 31,455.76

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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.