Home / 28,229.40-38,938.68-18,140.48

Finding the Fourth Proportional to 28,229.40, 38,938.68 and 18,140.48

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Solution

The fourth proportional to 28,229.40, 38,938.68 and 18,140.48 is: 25,022.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,229.40 : 38,938.68 = 18,140.48 : x
  2. Step 2: Convert to fraction form
    28,229.40/38,938.68 = 18,140.48/x
  3. Step 3: Cross multiply
    28,229.40x = 38,938.68 × 18,140.48
  4. Step 4: Simplify right side
    28,229.40x = 706,366,345.77
  5. Step 5: Solve for x
    x = 706,366,345.77/28,229.40
  6. Step 6: Final answer
    x = 25,022.36

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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.