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Finding the Fourth Proportional to 17,378.60, 23,982.50 and 9,420.80

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Solution

The fourth proportional to 17,378.60, 23,982.50 and 9,420.80 is: 13,000.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,378.60 : 23,982.50 = 9,420.80 : x
  2. Step 2: Convert to fraction form
    17,378.60/23,982.50 = 9,420.80/x
  3. Step 3: Cross multiply
    17,378.60x = 23,982.50 × 9,420.80
  4. Step 4: Simplify right side
    17,378.60x = 225,934,336.00
  5. Step 5: Solve for x
    x = 225,934,336.00/17,378.60
  6. Step 6: Final answer
    x = 13,000.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.