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Finding the Fourth Proportional to 7,344.40, 10,124.40 and 5,216.80

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Solution

The fourth proportional to 7,344.40, 10,124.40 and 5,216.80 is: 7,191.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,344.40 : 10,124.40 = 5,216.80 : x
  2. Step 2: Convert to fraction form
    7,344.40/10,124.40 = 5,216.80/x
  3. Step 3: Cross multiply
    7,344.40x = 10,124.40 × 5,216.80
  4. Step 4: Simplify right side
    7,344.40x = 52,816,969.92
  5. Step 5: Solve for x
    x = 52,816,969.92/7,344.40
  6. Step 6: Final answer
    x = 7,191.46

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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.