Home / 13,690.34-18,892.68-7,402.72

Finding the Fourth Proportional to 13,690.34, 18,892.68 and 7,402.72

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Solution

The fourth proportional to 13,690.34, 18,892.68 and 7,402.72 is: 10,215.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.34 : 18,892.68 = 7,402.72 : x
  2. Step 2: Convert to fraction form
    13,690.34/18,892.68 = 7,402.72/x
  3. Step 3: Cross multiply
    13,690.34x = 18,892.68 × 7,402.72
  4. Step 4: Simplify right side
    13,690.34x = 139,857,183.26
  5. Step 5: Solve for x
    x = 139,857,183.26/13,690.34
  6. Step 6: Final answer
    x = 10,215.75

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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.