Home / 20,969.69-31,454.30-8,486.32

Finding the Fourth Proportional to 20,969.69, 31,454.30 and 8,486.32

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Solution

The fourth proportional to 20,969.69, 31,454.30 and 8,486.32 is: 12,729.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.69 : 31,454.30 = 8,486.32 : x
  2. Step 2: Convert to fraction form
    20,969.69/31,454.30 = 8,486.32/x
  3. Step 3: Cross multiply
    20,969.69x = 31,454.30 × 8,486.32
  4. Step 4: Simplify right side
    20,969.69x = 266,931,232.87
  5. Step 5: Solve for x
    x = 266,931,232.87/20,969.69
  6. Step 6: Final answer
    x = 12,729.39

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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.