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Finding the Fourth Proportional to 6,420.78, 9,631.50 and 1,804.14

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Solution

The fourth proportional to 6,420.78, 9,631.50 and 1,804.14 is: 2,706.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,420.78 : 9,631.50 = 1,804.14 : x
  2. Step 2: Convert to fraction form
    6,420.78/9,631.50 = 1,804.14/x
  3. Step 3: Cross multiply
    6,420.78x = 9,631.50 × 1,804.14
  4. Step 4: Simplify right side
    6,420.78x = 17,376,574.41
  5. Step 5: Solve for x
    x = 17,376,574.41/6,420.78
  6. Step 6: Final answer
    x = 2,706.30

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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.