Home / 20,517.45-30,779.47-8,671.34

Finding the Fourth Proportional to 20,517.45, 30,779.47 and 8,671.34

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Solution

The fourth proportional to 20,517.45, 30,779.47 and 8,671.34 is: 13,008.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.45 : 30,779.47 = 8,671.34 : x
  2. Step 2: Convert to fraction form
    20,517.45/30,779.47 = 8,671.34/x
  3. Step 3: Cross multiply
    20,517.45x = 30,779.47 × 8,671.34
  4. Step 4: Simplify right side
    20,517.45x = 266,899,337.18
  5. Step 5: Solve for x
    x = 266,899,337.18/20,517.45
  6. Step 6: Final answer
    x = 13,008.41

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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.