Home / 21,969.12-32,939.70-18,638.51

Finding the Fourth Proportional to 21,969.12, 32,939.70 and 18,638.51

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Solution

The fourth proportional to 21,969.12, 32,939.70 and 18,638.51 is: 27,945.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,969.12 : 32,939.70 = 18,638.51 : x
  2. Step 2: Convert to fraction form
    21,969.12/32,939.70 = 18,638.51/x
  3. Step 3: Cross multiply
    21,969.12x = 32,939.70 × 18,638.51
  4. Step 4: Simplify right side
    21,969.12x = 613,947,058.96
  5. Step 5: Solve for x
    x = 613,947,058.96/21,969.12
  6. Step 6: Final answer
    x = 27,945.92

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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.