Home / 28,955.13-39,930.73-18,891.28

Finding the Fourth Proportional to 28,955.13, 39,930.73 and 18,891.28

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Solution

The fourth proportional to 28,955.13, 39,930.73 and 18,891.28 is: 26,052.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,955.13 : 39,930.73 = 18,891.28 : x
  2. Step 2: Convert to fraction form
    28,955.13/39,930.73 = 18,891.28/x
  3. Step 3: Cross multiply
    28,955.13x = 39,930.73 × 18,891.28
  4. Step 4: Simplify right side
    28,955.13x = 754,342,601.03
  5. Step 5: Solve for x
    x = 754,342,601.03/28,955.13
  6. Step 6: Final answer
    x = 26,052.12

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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.