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Finding the Fourth Proportional to 7,448.80, 10,279.32 and 4,136.80

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Solution

The fourth proportional to 7,448.80, 10,279.32 and 4,136.80 is: 5,708.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,448.80 : 10,279.32 = 4,136.80 : x
  2. Step 2: Convert to fraction form
    7,448.80/10,279.32 = 4,136.80/x
  3. Step 3: Cross multiply
    7,448.80x = 10,279.32 × 4,136.80
  4. Step 4: Simplify right side
    7,448.80x = 42,523,490.98
  5. Step 5: Solve for x
    x = 42,523,490.98/7,448.80
  6. Step 6: Final answer
    x = 5,708.77

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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.