Home / 12,531.78-18,790.38-4,741.20

Finding the Fourth Proportional to 12,531.78, 18,790.38 and 4,741.20

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Solution

The fourth proportional to 12,531.78, 18,790.38 and 4,741.20 is: 7,109.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,531.78 : 18,790.38 = 4,741.20 : x
  2. Step 2: Convert to fraction form
    12,531.78/18,790.38 = 4,741.20/x
  3. Step 3: Cross multiply
    12,531.78x = 18,790.38 × 4,741.20
  4. Step 4: Simplify right side
    12,531.78x = 89,088,949.66
  5. Step 5: Solve for x
    x = 89,088,949.66/12,531.78
  6. Step 6: Final answer
    x = 7,109.04

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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.