Home / 12,455.29-18,683-3,690.28

Finding the Fourth Proportional to 12,455.29, 18,683 and 3,690.28

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Solution

The fourth proportional to 12,455.29, 18,683 and 3,690.28 is: 5,535.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.29 : 18,683 = 3,690.28 : x
  2. Step 2: Convert to fraction form
    12,455.29/18,683 = 3,690.28/x
  3. Step 3: Cross multiply
    12,455.29x = 18,683 × 3,690.28
  4. Step 4: Simplify right side
    12,455.29x = 68,945,501.24
  5. Step 5: Solve for x
    x = 68,945,501.24/12,455.29
  6. Step 6: Final answer
    x = 5,535.44

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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.