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Finding the Fourth Proportional to 18,782.64, 25,921.80 and 10,401.84

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Solution

The fourth proportional to 18,782.64, 25,921.80 and 10,401.84 is: 14,355.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,782.64 : 25,921.80 = 10,401.84 : x
  2. Step 2: Convert to fraction form
    18,782.64/25,921.80 = 10,401.84/x
  3. Step 3: Cross multiply
    18,782.64x = 25,921.80 × 10,401.84
  4. Step 4: Simplify right side
    18,782.64x = 269,634,416.11
  5. Step 5: Solve for x
    x = 269,634,416.11/18,782.64
  6. Step 6: Final answer
    x = 14,355.51

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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.