Home / 28,649.12-42,972.73-11,781.54

Finding the Fourth Proportional to 28,649.12, 42,972.73 and 11,781.54

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Solution

The fourth proportional to 28,649.12, 42,972.73 and 11,781.54 is: 17,671.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,649.12 : 42,972.73 = 11,781.54 : x
  2. Step 2: Convert to fraction form
    28,649.12/42,972.73 = 11,781.54/x
  3. Step 3: Cross multiply
    28,649.12x = 42,972.73 × 11,781.54
  4. Step 4: Simplify right side
    28,649.12x = 506,284,878.50
  5. Step 5: Solve for x
    x = 506,284,878.50/28,649.12
  6. Step 6: Final answer
    x = 17,671.92

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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.