Home / 28,116-38,800.13-15,540.75

Finding the Fourth Proportional to 28,116, 38,800.13 and 15,540.75

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Solution

The fourth proportional to 28,116, 38,800.13 and 15,540.75 is: 21,446.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,116 : 38,800.13 = 15,540.75 : x
  2. Step 2: Convert to fraction form
    28,116/38,800.13 = 15,540.75/x
  3. Step 3: Cross multiply
    28,116x = 38,800.13 × 15,540.75
  4. Step 4: Simplify right side
    28,116x = 602,983,042.59
  5. Step 5: Solve for x
    x = 602,983,042.59/28,116
  6. Step 6: Final answer
    x = 21,446.26

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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.