Home / 19,640.70-27,098.55-12,561.30

Finding the Fourth Proportional to 19,640.70, 27,098.55 and 12,561.30

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Solution

The fourth proportional to 19,640.70, 27,098.55 and 12,561.30 is: 17,331.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,640.70 : 27,098.55 = 12,561.30 : x
  2. Step 2: Convert to fraction form
    19,640.70/27,098.55 = 12,561.30/x
  3. Step 3: Cross multiply
    19,640.70x = 27,098.55 × 12,561.30
  4. Step 4: Simplify right side
    19,640.70x = 340,393,016.12
  5. Step 5: Solve for x
    x = 340,393,016.12/19,640.70
  6. Step 6: Final answer
    x = 17,331.00

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.