Home / 20,675.20-31,005.42-8,985.64

Finding the Fourth Proportional to 20,675.20, 31,005.42 and 8,985.64

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Solution

The fourth proportional to 20,675.20, 31,005.42 and 8,985.64 is: 13,475.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,675.20 : 31,005.42 = 8,985.64 : x
  2. Step 2: Convert to fraction form
    20,675.20/31,005.42 = 8,985.64/x
  3. Step 3: Cross multiply
    20,675.20x = 31,005.42 × 8,985.64
  4. Step 4: Simplify right side
    20,675.20x = 278,603,542.17
  5. Step 5: Solve for x
    x = 278,603,542.17/20,675.20
  6. Step 6: Final answer
    x = 13,475.25

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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.