Home / 20,666.89-30,781.58-20,566.18

Finding the Fourth Proportional to 20,666.89, 30,781.58 and 20,566.18

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Solution

The fourth proportional to 20,666.89, 30,781.58 and 20,566.18 is: 30,631.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.89 : 30,781.58 = 20,566.18 : x
  2. Step 2: Convert to fraction form
    20,666.89/30,781.58 = 20,566.18/x
  3. Step 3: Cross multiply
    20,666.89x = 30,781.58 × 20,566.18
  4. Step 4: Simplify right side
    20,666.89x = 633,059,514.96
  5. Step 5: Solve for x
    x = 633,059,514.96/20,666.89
  6. Step 6: Final answer
    x = 30,631.58

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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.