Home / 28,131.84-42,172.68-18,140.16

Finding the Fourth Proportional to 28,131.84, 42,172.68 and 18,140.16

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Solution

The fourth proportional to 28,131.84, 42,172.68 and 18,140.16 is: 27,194.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,131.84 : 42,172.68 = 18,140.16 : x
  2. Step 2: Convert to fraction form
    28,131.84/42,172.68 = 18,140.16/x
  3. Step 3: Cross multiply
    28,131.84x = 42,172.68 × 18,140.16
  4. Step 4: Simplify right side
    28,131.84x = 765,019,162.83
  5. Step 5: Solve for x
    x = 765,019,162.83/28,131.84
  6. Step 6: Final answer
    x = 27,194.07

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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.