Home / 20,118.72-30,182.16-6,970.80

Finding the Fourth Proportional to 20,118.72, 30,182.16 and 6,970.80

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Solution

The fourth proportional to 20,118.72, 30,182.16 and 6,970.80 is: 10,457.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,118.72 : 30,182.16 = 6,970.80 : x
  2. Step 2: Convert to fraction form
    20,118.72/30,182.16 = 6,970.80/x
  3. Step 3: Cross multiply
    20,118.72x = 30,182.16 × 6,970.80
  4. Step 4: Simplify right side
    20,118.72x = 210,393,800.93
  5. Step 5: Solve for x
    x = 210,393,800.93/20,118.72
  6. Step 6: Final answer
    x = 10,457.61

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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.