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Finding the Fourth Proportional to 13,967.40, 20,948.70 and 5,197.80

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Solution

The fourth proportional to 13,967.40, 20,948.70 and 5,197.80 is: 7,795.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,967.40 : 20,948.70 = 5,197.80 : x
  2. Step 2: Convert to fraction form
    13,967.40/20,948.70 = 5,197.80/x
  3. Step 3: Cross multiply
    13,967.40x = 20,948.70 × 5,197.80
  4. Step 4: Simplify right side
    13,967.40x = 108,887,152.86
  5. Step 5: Solve for x
    x = 108,887,152.86/13,967.40
  6. Step 6: Final answer
    x = 7,795.81

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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.