Home / 30,381.57-45,595.40-21,086.73

Finding the Fourth Proportional to 30,381.57, 45,595.40 and 21,086.73

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Solution

The fourth proportional to 30,381.57, 45,595.40 and 21,086.73 is: 31,646.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,381.57 : 45,595.40 = 21,086.73 : x
  2. Step 2: Convert to fraction form
    30,381.57/45,595.40 = 21,086.73/x
  3. Step 3: Cross multiply
    30,381.57x = 45,595.40 × 21,086.73
  4. Step 4: Simplify right side
    30,381.57x = 961,457,783.61
  5. Step 5: Solve for x
    x = 961,457,783.61/30,381.57
  6. Step 6: Final answer
    x = 31,646.09

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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.