Home / 28,143.48-42,199.62-11,515.18

Finding the Fourth Proportional to 28,143.48, 42,199.62 and 11,515.18

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Solution

The fourth proportional to 28,143.48, 42,199.62 and 11,515.18 is: 17,266.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,143.48 : 42,199.62 = 11,515.18 : x
  2. Step 2: Convert to fraction form
    28,143.48/42,199.62 = 11,515.18/x
  3. Step 3: Cross multiply
    28,143.48x = 42,199.62 × 11,515.18
  4. Step 4: Simplify right side
    28,143.48x = 485,936,220.23
  5. Step 5: Solve for x
    x = 485,936,220.23/28,143.48
  6. Step 6: Final answer
    x = 17,266.39

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1.5x scale

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.