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Finding the Fourth Proportional to 10,492.70, 15,729.32 and 3,913.88

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Solution

The fourth proportional to 10,492.70, 15,729.32 and 3,913.88 is: 5,867.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,492.70 : 15,729.32 = 3,913.88 : x
  2. Step 2: Convert to fraction form
    10,492.70/15,729.32 = 3,913.88/x
  3. Step 3: Cross multiply
    10,492.70x = 15,729.32 × 3,913.88
  4. Step 4: Simplify right side
    10,492.70x = 61,562,670.96
  5. Step 5: Solve for x
    x = 61,562,670.96/10,492.70
  6. Step 6: Final answer
    x = 5,867.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.