Home / 19,399-26,769.36-11,439.40

Finding the Fourth Proportional to 19,399, 26,769.36 and 11,439.40

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Solution

The fourth proportional to 19,399, 26,769.36 and 11,439.40 is: 15,785.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,399 : 26,769.36 = 11,439.40 : x
  2. Step 2: Convert to fraction form
    19,399/26,769.36 = 11,439.40/x
  3. Step 3: Cross multiply
    19,399x = 26,769.36 × 11,439.40
  4. Step 4: Simplify right side
    19,399x = 306,225,416.78
  5. Step 5: Solve for x
    x = 306,225,416.78/19,399
  6. Step 6: Final answer
    x = 15,785.63

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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.