Home / 20,456.10-30,702.15-12,125.70

Finding the Fourth Proportional to 20,456.10, 30,702.15 and 12,125.70

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Solution

The fourth proportional to 20,456.10, 30,702.15 and 12,125.70 is: 18,199.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,456.10 : 30,702.15 = 12,125.70 : x
  2. Step 2: Convert to fraction form
    20,456.10/30,702.15 = 12,125.70/x
  3. Step 3: Cross multiply
    20,456.10x = 30,702.15 × 12,125.70
  4. Step 4: Simplify right side
    20,456.10x = 372,285,060.26
  5. Step 5: Solve for x
    x = 372,285,060.26/20,456.10
  6. Step 6: Final answer
    x = 18,199.22

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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.