Home / 45,138.53-67,714.10-18,837.25

Finding the Fourth Proportional to 45,138.53, 67,714.10 and 18,837.25

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Solution

The fourth proportional to 45,138.53, 67,714.10 and 18,837.25 is: 28,258.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,138.53 : 67,714.10 = 18,837.25 : x
  2. Step 2: Convert to fraction form
    45,138.53/67,714.10 = 18,837.25/x
  3. Step 3: Cross multiply
    45,138.53x = 67,714.10 × 18,837.25
  4. Step 4: Simplify right side
    45,138.53x = 1,275,547,430.23
  5. Step 5: Solve for x
    x = 1,275,547,430.23/45,138.53
  6. Step 6: Final answer
    x = 28,258.51

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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.