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Finding the Fourth Proportional to 18,428.04, 25,428.47 and 10,468.04

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Solution

The fourth proportional to 18,428.04, 25,428.47 and 10,468.04 is: 14,444.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,428.04 : 25,428.47 = 10,468.04 : x
  2. Step 2: Convert to fraction form
    18,428.04/25,428.47 = 10,468.04/x
  3. Step 3: Cross multiply
    18,428.04x = 25,428.47 × 10,468.04
  4. Step 4: Simplify right side
    18,428.04x = 266,186,061.62
  5. Step 5: Solve for x
    x = 266,186,061.62/18,428.04
  6. Step 6: Final answer
    x = 14,444.62

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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.