Home / 10,926.72-15,078.68-6,389.84

Finding the Fourth Proportional to 10,926.72, 15,078.68 and 6,389.84

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Solution

The fourth proportional to 10,926.72, 15,078.68 and 6,389.84 is: 8,817.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,926.72 : 15,078.68 = 6,389.84 : x
  2. Step 2: Convert to fraction form
    10,926.72/15,078.68 = 6,389.84/x
  3. Step 3: Cross multiply
    10,926.72x = 15,078.68 × 6,389.84
  4. Step 4: Simplify right side
    10,926.72x = 96,350,349.74
  5. Step 5: Solve for x
    x = 96,350,349.74/10,926.72
  6. Step 6: Final answer
    x = 8,817.86

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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.