Home / 20,885.72-31,331.71-7,561.84

Finding the Fourth Proportional to 20,885.72, 31,331.71 and 7,561.84

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Solution

The fourth proportional to 20,885.72, 31,331.71 and 7,561.84 is: 11,343.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.72 : 31,331.71 = 7,561.84 : x
  2. Step 2: Convert to fraction form
    20,885.72/31,331.71 = 7,561.84/x
  3. Step 3: Cross multiply
    20,885.72x = 31,331.71 × 7,561.84
  4. Step 4: Simplify right side
    20,885.72x = 236,925,377.95
  5. Step 5: Solve for x
    x = 236,925,377.95/20,885.72
  6. Step 6: Final answer
    x = 11,343.89

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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.