Home / 20,285.10-30,427.65-12,849.30

Finding the Fourth Proportional to 20,285.10, 30,427.65 and 12,849.30

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Solution

The fourth proportional to 20,285.10, 30,427.65 and 12,849.30 is: 19,273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.10 : 30,427.65 = 12,849.30 : x
  2. Step 2: Convert to fraction form
    20,285.10/30,427.65 = 12,849.30/x
  3. Step 3: Cross multiply
    20,285.10x = 30,427.65 × 12,849.30
  4. Step 4: Simplify right side
    20,285.10x = 390,974,003.15
  5. Step 5: Solve for x
    x = 390,974,003.15/20,285.10
  6. Step 6: Final answer
    x = 19,273.95

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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.