Home / 13,245.12-18,278.16-7,656

Finding the Fourth Proportional to 13,245.12, 18,278.16 and 7,656

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Solution

The fourth proportional to 13,245.12, 18,278.16 and 7,656 is: 10,565.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,245.12 : 18,278.16 = 7,656 : x
  2. Step 2: Convert to fraction form
    13,245.12/18,278.16 = 7,656/x
  3. Step 3: Cross multiply
    13,245.12x = 18,278.16 × 7,656
  4. Step 4: Simplify right side
    13,245.12x = 139,937,592.96
  5. Step 5: Solve for x
    x = 139,937,592.96/13,245.12
  6. Step 6: Final answer
    x = 10,565.22

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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.