Home / 20,748.98-31,129.25-10,222.07

Finding the Fourth Proportional to 20,748.98, 31,129.25 and 10,222.07

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Solution

The fourth proportional to 20,748.98, 31,129.25 and 10,222.07 is: 15,335.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.98 : 31,129.25 = 10,222.07 : x
  2. Step 2: Convert to fraction form
    20,748.98/31,129.25 = 10,222.07/x
  3. Step 3: Cross multiply
    20,748.98x = 31,129.25 × 10,222.07
  4. Step 4: Simplify right side
    20,748.98x = 318,205,165.79
  5. Step 5: Solve for x
    x = 318,205,165.79/20,748.98
  6. Step 6: Final answer
    x = 15,335.94

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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.