Home / 21,899.30-30,243.24-18,868.28

Finding the Fourth Proportional to 21,899.30, 30,243.24 and 18,868.28

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Solution

The fourth proportional to 21,899.30, 30,243.24 and 18,868.28 is: 26,057.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,899.30 : 30,243.24 = 18,868.28 : x
  2. Step 2: Convert to fraction form
    21,899.30/30,243.24 = 18,868.28/x
  3. Step 3: Cross multiply
    21,899.30x = 30,243.24 × 18,868.28
  4. Step 4: Simplify right side
    21,899.30x = 570,637,769.21
  5. Step 5: Solve for x
    x = 570,637,769.21/21,899.30
  6. Step 6: Final answer
    x = 26,057.36

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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.