Home / 19,639.40-27,100.71-11,139.66

Finding the Fourth Proportional to 19,639.40, 27,100.71 and 11,139.66

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Solution

The fourth proportional to 19,639.40, 27,100.71 and 11,139.66 is: 15,371.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,639.40 : 27,100.71 = 11,139.66 : x
  2. Step 2: Convert to fraction form
    19,639.40/27,100.71 = 11,139.66/x
  3. Step 3: Cross multiply
    19,639.40x = 27,100.71 × 11,139.66
  4. Step 4: Simplify right side
    19,639.40x = 301,892,695.16
  5. Step 5: Solve for x
    x = 301,892,695.16/19,639.40
  6. Step 6: Final answer
    x = 15,371.79

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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.