Home / 20,974.55-31,461.08-9,128.30

Finding the Fourth Proportional to 20,974.55, 31,461.08 and 9,128.30

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Solution

The fourth proportional to 20,974.55, 31,461.08 and 9,128.30 is: 13,692.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,974.55 : 31,461.08 = 9,128.30 : x
  2. Step 2: Convert to fraction form
    20,974.55/31,461.08 = 9,128.30/x
  3. Step 3: Cross multiply
    20,974.55x = 31,461.08 × 9,128.30
  4. Step 4: Simplify right side
    20,974.55x = 287,185,973.62
  5. Step 5: Solve for x
    x = 287,185,973.62/20,974.55
  6. Step 6: Final answer
    x = 13,692.12

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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.