Home / 19,790.67-29,642.85-9,912.72

Finding the Fourth Proportional to 19,790.67, 29,642.85 and 9,912.72

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Solution

The fourth proportional to 19,790.67, 29,642.85 and 9,912.72 is: 14,847.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,790.67 : 29,642.85 = 9,912.72 : x
  2. Step 2: Convert to fraction form
    19,790.67/29,642.85 = 9,912.72/x
  3. Step 3: Cross multiply
    19,790.67x = 29,642.85 × 9,912.72
  4. Step 4: Simplify right side
    19,790.67x = 293,841,272.05
  5. Step 5: Solve for x
    x = 293,841,272.05/19,790.67
  6. Step 6: Final answer
    x = 14,847.46

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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.