Home / 20,885.67-31,340.79-7,747.20

Finding the Fourth Proportional to 20,885.67, 31,340.79 and 7,747.20

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Solution

The fourth proportional to 20,885.67, 31,340.79 and 7,747.20 is: 11,625.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,885.67 : 31,340.79 = 7,747.20 : x
  2. Step 2: Convert to fraction form
    20,885.67/31,340.79 = 7,747.20/x
  3. Step 3: Cross multiply
    20,885.67x = 31,340.79 × 7,747.20
  4. Step 4: Simplify right side
    20,885.67x = 242,803,368.29
  5. Step 5: Solve for x
    x = 242,803,368.29/20,885.67
  6. Step 6: Final answer
    x = 11,625.36

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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.