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Finding the Fourth Proportional to 17,378.10, 23,981.81 and 9,420.30

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Solution

The fourth proportional to 17,378.10, 23,981.81 and 9,420.30 is: 13,000.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,378.10 : 23,981.81 = 9,420.30 : x
  2. Step 2: Convert to fraction form
    17,378.10/23,981.81 = 9,420.30/x
  3. Step 3: Cross multiply
    17,378.10x = 23,981.81 × 9,420.30
  4. Step 4: Simplify right side
    17,378.10x = 225,915,844.74
  5. Step 5: Solve for x
    x = 225,915,844.74/17,378.10
  6. Step 6: Final answer
    x = 13,000.03

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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.