Home / 21,193.20-31,789.80-6,404.40

Finding the Fourth Proportional to 21,193.20, 31,789.80 and 6,404.40

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Solution

The fourth proportional to 21,193.20, 31,789.80 and 6,404.40 is: 9,606.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,193.20 : 31,789.80 = 6,404.40 : x
  2. Step 2: Convert to fraction form
    21,193.20/31,789.80 = 6,404.40/x
  3. Step 3: Cross multiply
    21,193.20x = 31,789.80 × 6,404.40
  4. Step 4: Simplify right side
    21,193.20x = 203,594,595.12
  5. Step 5: Solve for x
    x = 203,594,595.12/21,193.20
  6. Step 6: Final answer
    x = 9,606.60

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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.