Home / 10,639.44-15,937.82-6,420.28

Finding the Fourth Proportional to 10,639.44, 15,937.82 and 6,420.28

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Solution

The fourth proportional to 10,639.44, 15,937.82 and 6,420.28 is: 9,617.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.44 : 15,937.82 = 6,420.28 : x
  2. Step 2: Convert to fraction form
    10,639.44/15,937.82 = 6,420.28/x
  3. Step 3: Cross multiply
    10,639.44x = 15,937.82 × 6,420.28
  4. Step 4: Simplify right side
    10,639.44x = 102,325,266.99
  5. Step 5: Solve for x
    x = 102,325,266.99/10,639.44
  6. Step 6: Final answer
    x = 9,617.54

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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.