Home / 11,145.37-15,379.59-6,428.74

Finding the Fourth Proportional to 11,145.37, 15,379.59 and 6,428.74

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Solution

The fourth proportional to 11,145.37, 15,379.59 and 6,428.74 is: 8,871.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.37 : 15,379.59 = 6,428.74 : x
  2. Step 2: Convert to fraction form
    11,145.37/15,379.59 = 6,428.74/x
  3. Step 3: Cross multiply
    11,145.37x = 15,379.59 × 6,428.74
  4. Step 4: Simplify right side
    11,145.37x = 98,871,385.42
  5. Step 5: Solve for x
    x = 98,871,385.42/11,145.37
  6. Step 6: Final answer
    x = 8,871.07

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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.