Home / 11,431.08-15,780.06-6,715.74

Finding the Fourth Proportional to 11,431.08, 15,780.06 and 6,715.74

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Solution

The fourth proportional to 11,431.08, 15,780.06 and 6,715.74 is: 9,270.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,431.08 : 15,780.06 = 6,715.74 : x
  2. Step 2: Convert to fraction form
    11,431.08/15,780.06 = 6,715.74/x
  3. Step 3: Cross multiply
    11,431.08x = 15,780.06 × 6,715.74
  4. Step 4: Simplify right side
    11,431.08x = 105,974,780.14
  5. Step 5: Solve for x
    x = 105,974,780.14/11,431.08
  6. Step 6: Final answer
    x = 9,270.76

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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.