Home / 21,032.28-31,511.30-18,744.12

Finding the Fourth Proportional to 21,032.28, 31,511.30 and 18,744.12

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Solution

The fourth proportional to 21,032.28, 31,511.30 and 18,744.12 is: 28,083.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,032.28 : 31,511.30 = 18,744.12 : x
  2. Step 2: Convert to fraction form
    21,032.28/31,511.30 = 18,744.12/x
  3. Step 3: Cross multiply
    21,032.28x = 31,511.30 × 18,744.12
  4. Step 4: Simplify right side
    21,032.28x = 590,651,588.56
  5. Step 5: Solve for x
    x = 590,651,588.56/21,032.28
  6. Step 6: Final answer
    x = 28,083.10

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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.