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Finding the Fourth Proportional to 13,648.99, 20,469.12 and 5,326.98

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Solution

The fourth proportional to 13,648.99, 20,469.12 and 5,326.98 is: 7,988.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,648.99 : 20,469.12 = 5,326.98 : x
  2. Step 2: Convert to fraction form
    13,648.99/20,469.12 = 5,326.98/x
  3. Step 3: Cross multiply
    13,648.99x = 20,469.12 × 5,326.98
  4. Step 4: Simplify right side
    13,648.99x = 109,038,592.86
  5. Step 5: Solve for x
    x = 109,038,592.86/13,648.99
  6. Step 6: Final answer
    x = 7,988.77

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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.