Home / 7,555.78-11,278.21-6,999.12

Finding the Fourth Proportional to 7,555.78, 11,278.21 and 6,999.12

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Solution

The fourth proportional to 7,555.78, 11,278.21 and 6,999.12 is: 10,447.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,555.78 : 11,278.21 = 6,999.12 : x
  2. Step 2: Convert to fraction form
    7,555.78/11,278.21 = 6,999.12/x
  3. Step 3: Cross multiply
    7,555.78x = 11,278.21 × 6,999.12
  4. Step 4: Simplify right side
    7,555.78x = 78,937,499.24
  5. Step 5: Solve for x
    x = 78,937,499.24/7,555.78
  6. Step 6: Final answer
    x = 10,447.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.