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Finding the Fourth Proportional to 11,421.71, 17,091.04 and 9,428.81

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Solution

The fourth proportional to 11,421.71, 17,091.04 and 9,428.81 is: 14,108.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,421.71 : 17,091.04 = 9,428.81 : x
  2. Step 2: Convert to fraction form
    11,421.71/17,091.04 = 9,428.81/x
  3. Step 3: Cross multiply
    11,421.71x = 17,091.04 × 9,428.81
  4. Step 4: Simplify right side
    11,421.71x = 161,148,168.86
  5. Step 5: Solve for x
    x = 161,148,168.86/11,421.71
  6. Step 6: Final answer
    x = 14,108.94

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1.5x scale

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.