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Finding the Fourth Proportional to 19,401.69, 28,971.02 and 15,408.12

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Solution

The fourth proportional to 19,401.69, 28,971.02 and 15,408.12 is: 23,007.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,401.69 : 28,971.02 = 15,408.12 : x
  2. Step 2: Convert to fraction form
    19,401.69/28,971.02 = 15,408.12/x
  3. Step 3: Cross multiply
    19,401.69x = 28,971.02 × 15,408.12
  4. Step 4: Simplify right side
    19,401.69x = 446,388,875.64
  5. Step 5: Solve for x
    x = 446,388,875.64/19,401.69
  6. Step 6: Final answer
    x = 23,007.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.