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Finding the Fourth Proportional to 18,659.76, 25,738.74 and 11,100.71

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Solution

The fourth proportional to 18,659.76, 25,738.74 and 11,100.71 is: 15,312.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.76 : 25,738.74 = 11,100.71 : x
  2. Step 2: Convert to fraction form
    18,659.76/25,738.74 = 11,100.71/x
  3. Step 3: Cross multiply
    18,659.76x = 25,738.74 × 11,100.71
  4. Step 4: Simplify right side
    18,659.76x = 285,718,159.81
  5. Step 5: Solve for x
    x = 285,718,159.81/18,659.76
  6. Step 6: Final answer
    x = 15,312.00

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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.