Home / 28,512.36-42,763.68-7,731

Finding the Fourth Proportional to 28,512.36, 42,763.68 and 7,731

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Solution

The fourth proportional to 28,512.36, 42,763.68 and 7,731 is: 11,595.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,512.36 : 42,763.68 = 7,731 : x
  2. Step 2: Convert to fraction form
    28,512.36/42,763.68 = 7,731/x
  3. Step 3: Cross multiply
    28,512.36x = 42,763.68 × 7,731
  4. Step 4: Simplify right side
    28,512.36x = 330,606,010.08
  5. Step 5: Solve for x
    x = 330,606,010.08/28,512.36
  6. Step 6: Final answer
    x = 11,595.18

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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.