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Finding the Fourth Proportional to 18,697.17, 28,038.47 and 7,004.01

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Solution

The fourth proportional to 18,697.17, 28,038.47 and 7,004.01 is: 10,503.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.17 : 28,038.47 = 7,004.01 : x
  2. Step 2: Convert to fraction form
    18,697.17/28,038.47 = 7,004.01/x
  3. Step 3: Cross multiply
    18,697.17x = 28,038.47 × 7,004.01
  4. Step 4: Simplify right side
    18,697.17x = 196,381,689.24
  5. Step 5: Solve for x
    x = 196,381,689.24/18,697.17
  6. Step 6: Final answer
    x = 10,503.28

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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.