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Finding the Fourth Proportional to 18,954.24, 28,441.92 and 7,869.12

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Solution

The fourth proportional to 18,954.24, 28,441.92 and 7,869.12 is: 11,808.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,954.24 : 28,441.92 = 7,869.12 : x
  2. Step 2: Convert to fraction form
    18,954.24/28,441.92 = 7,869.12/x
  3. Step 3: Cross multiply
    18,954.24x = 28,441.92 × 7,869.12
  4. Step 4: Simplify right side
    18,954.24x = 223,812,881.51
  5. Step 5: Solve for x
    x = 223,812,881.51/18,954.24
  6. Step 6: Final answer
    x = 11,808.06

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.