Home / 11,211.13-15,471.05-6,431.87

Finding the Fourth Proportional to 11,211.13, 15,471.05 and 6,431.87

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Solution

The fourth proportional to 11,211.13, 15,471.05 and 6,431.87 is: 8,875.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,211.13 : 15,471.05 = 6,431.87 : x
  2. Step 2: Convert to fraction form
    11,211.13/15,471.05 = 6,431.87/x
  3. Step 3: Cross multiply
    11,211.13x = 15,471.05 × 6,431.87
  4. Step 4: Simplify right side
    11,211.13x = 99,507,837.12
  5. Step 5: Solve for x
    x = 99,507,837.12/11,211.13
  6. Step 6: Final answer
    x = 8,875.81

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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.