Home / 20,759.49-31,139.24-18,688.19

Finding the Fourth Proportional to 20,759.49, 31,139.24 and 18,688.19

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Solution

The fourth proportional to 20,759.49, 31,139.24 and 18,688.19 is: 28,032.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,759.49 : 31,139.24 = 18,688.19 : x
  2. Step 2: Convert to fraction form
    20,759.49/31,139.24 = 18,688.19/x
  3. Step 3: Cross multiply
    20,759.49x = 31,139.24 × 18,688.19
  4. Step 4: Simplify right side
    20,759.49x = 581,935,784.44
  5. Step 5: Solve for x
    x = 581,935,784.44/20,759.49
  6. Step 6: Final answer
    x = 28,032.28

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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.