Home / 20,938.55-31,407.84-9,837.09

Finding the Fourth Proportional to 20,938.55, 31,407.84 and 9,837.09

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Solution

The fourth proportional to 20,938.55, 31,407.84 and 9,837.09 is: 14,755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,938.55 : 31,407.84 = 9,837.09 : x
  2. Step 2: Convert to fraction form
    20,938.55/31,407.84 = 9,837.09/x
  3. Step 3: Cross multiply
    20,938.55x = 31,407.84 × 9,837.09
  4. Step 4: Simplify right side
    20,938.55x = 308,961,748.79
  5. Step 5: Solve for x
    x = 308,961,748.79/20,938.55
  6. Step 6: Final answer
    x = 14,755.65

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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.