Home / 12,345.47-18,512.13-3,578.03

Finding the Fourth Proportional to 12,345.47, 18,512.13 and 3,578.03

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Solution

The fourth proportional to 12,345.47, 18,512.13 and 3,578.03 is: 5,365.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,345.47 : 18,512.13 = 3,578.03 : x
  2. Step 2: Convert to fraction form
    12,345.47/18,512.13 = 3,578.03/x
  3. Step 3: Cross multiply
    12,345.47x = 18,512.13 × 3,578.03
  4. Step 4: Simplify right side
    12,345.47x = 66,236,956.50
  5. Step 5: Solve for x
    x = 66,236,956.50/12,345.47
  6. Step 6: Final answer
    x = 5,365.28

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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.