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Finding the Fourth Proportional to 19,145.84, 28,719.09 and 7,305.10

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Solution

The fourth proportional to 19,145.84, 28,719.09 and 7,305.10 is: 10,957.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,145.84 : 28,719.09 = 7,305.10 : x
  2. Step 2: Convert to fraction form
    19,145.84/28,719.09 = 7,305.10/x
  3. Step 3: Cross multiply
    19,145.84x = 28,719.09 × 7,305.10
  4. Step 4: Simplify right side
    19,145.84x = 209,795,914.11
  5. Step 5: Solve for x
    x = 209,795,914.11/19,145.84
  6. Step 6: Final answer
    x = 10,957.78

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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.