Home / 11,390.55-15,718.91-6,354.78

Finding the Fourth Proportional to 11,390.55, 15,718.91 and 6,354.78

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Solution

The fourth proportional to 11,390.55, 15,718.91 and 6,354.78 is: 8,769.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,390.55 : 15,718.91 = 6,354.78 : x
  2. Step 2: Convert to fraction form
    11,390.55/15,718.91 = 6,354.78/x
  3. Step 3: Cross multiply
    11,390.55x = 15,718.91 × 6,354.78
  4. Step 4: Simplify right side
    11,390.55x = 99,890,177.79
  5. Step 5: Solve for x
    x = 99,890,177.79/11,390.55
  6. Step 6: Final answer
    x = 8,769.56

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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.