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Finding the Fourth Proportional to 28,396.80, 42,595.20 and 7,336.80

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Solution

The fourth proportional to 28,396.80, 42,595.20 and 7,336.80 is: 11,005.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,396.80 : 42,595.20 = 7,336.80 : x
  2. Step 2: Convert to fraction form
    28,396.80/42,595.20 = 7,336.80/x
  3. Step 3: Cross multiply
    28,396.80x = 42,595.20 × 7,336.80
  4. Step 4: Simplify right side
    28,396.80x = 312,512,463.36
  5. Step 5: Solve for x
    x = 312,512,463.36/28,396.80
  6. Step 6: Final answer
    x = 11,005.20

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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.