Home / 20,861.67-31,106.44-18,543.45

Finding the Fourth Proportional to 20,861.67, 31,106.44 and 18,543.45

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Solution

The fourth proportional to 20,861.67, 31,106.44 and 18,543.45 is: 27,649.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.67 : 31,106.44 = 18,543.45 : x
  2. Step 2: Convert to fraction form
    20,861.67/31,106.44 = 18,543.45/x
  3. Step 3: Cross multiply
    20,861.67x = 31,106.44 × 18,543.45
  4. Step 4: Simplify right side
    20,861.67x = 576,820,714.82
  5. Step 5: Solve for x
    x = 576,820,714.82/20,861.67
  6. Step 6: Final answer
    x = 27,649.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.