Home / 21,905.70-30,228.23-13,404.35

Finding the Fourth Proportional to 21,905.70, 30,228.23 and 13,404.35

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Solution

The fourth proportional to 21,905.70, 30,228.23 and 13,404.35 is: 18,497.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.70 : 30,228.23 = 13,404.35 : x
  2. Step 2: Convert to fraction form
    21,905.70/30,228.23 = 13,404.35/x
  3. Step 3: Cross multiply
    21,905.70x = 30,228.23 × 13,404.35
  4. Step 4: Simplify right side
    21,905.70x = 405,189,774.80
  5. Step 5: Solve for x
    x = 405,189,774.80/21,905.70
  6. Step 6: Final answer
    x = 18,497.00

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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.