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Finding the Fourth Proportional to 11,389.64, 15,717.72 and 6,353.72

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Solution

The fourth proportional to 11,389.64, 15,717.72 and 6,353.72 is: 8,768.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,389.64 : 15,717.72 = 6,353.72 : x
  2. Step 2: Convert to fraction form
    11,389.64/15,717.72 = 6,353.72/x
  3. Step 3: Cross multiply
    11,389.64x = 15,717.72 × 6,353.72
  4. Step 4: Simplify right side
    11,389.64x = 99,865,991.92
  5. Step 5: Solve for x
    x = 99,865,991.92/11,389.64
  6. Step 6: Final answer
    x = 8,768.14

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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.