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Finding the Fourth Proportional to 10,264.65, 15,390.78 and 4,017.21

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Solution

The fourth proportional to 10,264.65, 15,390.78 and 4,017.21 is: 6,023.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,264.65 : 15,390.78 = 4,017.21 : x
  2. Step 2: Convert to fraction form
    10,264.65/15,390.78 = 4,017.21/x
  3. Step 3: Cross multiply
    10,264.65x = 15,390.78 × 4,017.21
  4. Step 4: Simplify right side
    10,264.65x = 61,827,995.32
  5. Step 5: Solve for x
    x = 61,827,995.32/10,264.65
  6. Step 6: Final answer
    x = 6,023.39

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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.