Home / 31,555.11-43,526.73-20,220.78

Finding the Fourth Proportional to 31,555.11, 43,526.73 and 20,220.78

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Solution

The fourth proportional to 31,555.11, 43,526.73 and 20,220.78 is: 27,892.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,555.11 : 43,526.73 = 20,220.78 : x
  2. Step 2: Convert to fraction form
    31,555.11/43,526.73 = 20,220.78/x
  3. Step 3: Cross multiply
    31,555.11x = 43,526.73 × 20,220.78
  4. Step 4: Simplify right side
    31,555.11x = 880,144,431.45
  5. Step 5: Solve for x
    x = 880,144,431.45/31,555.11
  6. Step 6: Final answer
    x = 27,892.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.