Home / 28,072.34-42,121.62-12,275.31

Finding the Fourth Proportional to 28,072.34, 42,121.62 and 12,275.31

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Solution

The fourth proportional to 28,072.34, 42,121.62 and 12,275.31 is: 18,418.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,072.34 : 42,121.62 = 12,275.31 : x
  2. Step 2: Convert to fraction form
    28,072.34/42,121.62 = 12,275.31/x
  3. Step 3: Cross multiply
    28,072.34x = 42,121.62 × 12,275.31
  4. Step 4: Simplify right side
    28,072.34x = 517,055,943.20
  5. Step 5: Solve for x
    x = 517,055,943.20/28,072.34
  6. Step 6: Final answer
    x = 18,418.70

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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.