Home / 13,690.12-18,892.40-7,402.56

Finding the Fourth Proportional to 13,690.12, 18,892.40 and 7,402.56

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Solution

The fourth proportional to 13,690.12, 18,892.40 and 7,402.56 is: 10,215.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.12 : 18,892.40 = 7,402.56 : x
  2. Step 2: Convert to fraction form
    13,690.12/18,892.40 = 7,402.56/x
  3. Step 3: Cross multiply
    13,690.12x = 18,892.40 × 7,402.56
  4. Step 4: Simplify right side
    13,690.12x = 139,852,124.54
  5. Step 5: Solve for x
    x = 139,852,124.54/13,690.12
  6. Step 6: Final answer
    x = 10,215.55

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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.