Home / 20,257.40-27,956.40-11,305.28

Finding the Fourth Proportional to 20,257.40, 27,956.40 and 11,305.28

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Solution

The fourth proportional to 20,257.40, 27,956.40 and 11,305.28 is: 15,601.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,257.40 : 27,956.40 = 11,305.28 : x
  2. Step 2: Convert to fraction form
    20,257.40/27,956.40 = 11,305.28/x
  3. Step 3: Cross multiply
    20,257.40x = 27,956.40 × 11,305.28
  4. Step 4: Simplify right side
    20,257.40x = 316,054,929.79
  5. Step 5: Solve for x
    x = 316,054,929.79/20,257.40
  6. Step 6: Final answer
    x = 15,601.95

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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.