Home / 21,285.60-31,942.88-7,434.56

Finding the Fourth Proportional to 21,285.60, 31,942.88 and 7,434.56

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Solution

The fourth proportional to 21,285.60, 31,942.88 and 7,434.56 is: 11,156.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,285.60 : 31,942.88 = 7,434.56 : x
  2. Step 2: Convert to fraction form
    21,285.60/31,942.88 = 7,434.56/x
  3. Step 3: Cross multiply
    21,285.60x = 31,942.88 × 7,434.56
  4. Step 4: Simplify right side
    21,285.60x = 237,481,257.93
  5. Step 5: Solve for x
    x = 237,481,257.93/21,285.60
  6. Step 6: Final answer
    x = 11,156.90

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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.