Home / 12,490.95-18,741.69-11,439.78

Finding the Fourth Proportional to 12,490.95, 18,741.69 and 11,439.78

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Solution

The fourth proportional to 12,490.95, 18,741.69 and 11,439.78 is: 17,164.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,490.95 : 18,741.69 = 11,439.78 : x
  2. Step 2: Convert to fraction form
    12,490.95/18,741.69 = 11,439.78/x
  3. Step 3: Cross multiply
    12,490.95x = 18,741.69 × 11,439.78
  4. Step 4: Simplify right side
    12,490.95x = 214,400,810.43
  5. Step 5: Solve for x
    x = 214,400,810.43/12,490.95
  6. Step 6: Final answer
    x = 17,164.49

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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.