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Finding the Fourth Proportional to 10,717.16, 16,049.66 and 7,421

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Solution

The fourth proportional to 10,717.16, 16,049.66 and 7,421 is: 11,113.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,717.16 : 16,049.66 = 7,421 : x
  2. Step 2: Convert to fraction form
    10,717.16/16,049.66 = 7,421/x
  3. Step 3: Cross multiply
    10,717.16x = 16,049.66 × 7,421
  4. Step 4: Simplify right side
    10,717.16x = 119,104,526.86
  5. Step 5: Solve for x
    x = 119,104,526.86/10,717.16
  6. Step 6: Final answer
    x = 11,113.44

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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.