Home / 13,947.80-20,921.70-8,042.90

Finding the Fourth Proportional to 13,947.80, 20,921.70 and 8,042.90

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Solution

The fourth proportional to 13,947.80, 20,921.70 and 8,042.90 is: 12,064.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,947.80 : 20,921.70 = 8,042.90 : x
  2. Step 2: Convert to fraction form
    13,947.80/20,921.70 = 8,042.90/x
  3. Step 3: Cross multiply
    13,947.80x = 20,921.70 × 8,042.90
  4. Step 4: Simplify right side
    13,947.80x = 168,271,140.93
  5. Step 5: Solve for x
    x = 168,271,140.93/13,947.80
  6. Step 6: Final answer
    x = 12,064.35

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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.