Home / 21,235.67-31,857.35-8,748.75

Finding the Fourth Proportional to 21,235.67, 31,857.35 and 8,748.75

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Solution

The fourth proportional to 21,235.67, 31,857.35 and 8,748.75 is: 13,124.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,235.67 : 31,857.35 = 8,748.75 : x
  2. Step 2: Convert to fraction form
    21,235.67/31,857.35 = 8,748.75/x
  3. Step 3: Cross multiply
    21,235.67x = 31,857.35 × 8,748.75
  4. Step 4: Simplify right side
    21,235.67x = 278,711,947.07
  5. Step 5: Solve for x
    x = 278,711,947.07/21,235.67
  6. Step 6: Final answer
    x = 13,124.71

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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.