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Finding the Fourth Proportional to 13,690.66, 18,893.11 and 7,403.04

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Solution

The fourth proportional to 13,690.66, 18,893.11 and 7,403.04 is: 10,216.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.66 : 18,893.11 = 7,403.04 : x
  2. Step 2: Convert to fraction form
    13,690.66/18,893.11 = 7,403.04/x
  3. Step 3: Cross multiply
    13,690.66x = 18,893.11 × 7,403.04
  4. Step 4: Simplify right side
    13,690.66x = 139,866,317.57
  5. Step 5: Solve for x
    x = 139,866,317.57/13,690.66
  6. Step 6: Final answer
    x = 10,216.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.