Home / 11,105.29-15,325.67-6,389.57

Finding the Fourth Proportional to 11,105.29, 15,325.67 and 6,389.57

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Solution

The fourth proportional to 11,105.29, 15,325.67 and 6,389.57 is: 8,817.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,105.29 : 15,325.67 = 6,389.57 : x
  2. Step 2: Convert to fraction form
    11,105.29/15,325.67 = 6,389.57/x
  3. Step 3: Cross multiply
    11,105.29x = 15,325.67 × 6,389.57
  4. Step 4: Simplify right side
    11,105.29x = 97,924,441.26
  5. Step 5: Solve for x
    x = 97,924,441.26/11,105.29
  6. Step 6: Final answer
    x = 8,817.82

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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.