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Finding the Fourth Proportional to 13,322.40, 19,940.40 and 10,384.80

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Solution

The fourth proportional to 13,322.40, 19,940.40 and 10,384.80 is: 15,543.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,322.40 : 19,940.40 = 10,384.80 : x
  2. Step 2: Convert to fraction form
    13,322.40/19,940.40 = 10,384.80/x
  3. Step 3: Cross multiply
    13,322.40x = 19,940.40 × 10,384.80
  4. Step 4: Simplify right side
    13,322.40x = 207,077,065.92
  5. Step 5: Solve for x
    x = 207,077,065.92/13,322.40
  6. Step 6: Final answer
    x = 15,543.53

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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.