Home / 21,222.72-31,839.20-6,430.76

Finding the Fourth Proportional to 21,222.72, 31,839.20 and 6,430.76

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Solution

The fourth proportional to 21,222.72, 31,839.20 and 6,430.76 is: 9,647.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,222.72 : 31,839.20 = 6,430.76 : x
  2. Step 2: Convert to fraction form
    21,222.72/31,839.20 = 6,430.76/x
  3. Step 3: Cross multiply
    21,222.72x = 31,839.20 × 6,430.76
  4. Step 4: Simplify right side
    21,222.72x = 204,750,253.79
  5. Step 5: Solve for x
    x = 204,750,253.79/21,222.72
  6. Step 6: Final answer
    x = 9,647.69

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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.