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Finding the Fourth Proportional to 28,007.40, 42,012.18 and 7,230.36

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Solution

The fourth proportional to 28,007.40, 42,012.18 and 7,230.36 is: 10,845.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,007.40 : 42,012.18 = 7,230.36 : x
  2. Step 2: Convert to fraction form
    28,007.40/42,012.18 = 7,230.36/x
  3. Step 3: Cross multiply
    28,007.40x = 42,012.18 × 7,230.36
  4. Step 4: Simplify right side
    28,007.40x = 303,763,185.78
  5. Step 5: Solve for x
    x = 303,763,185.78/28,007.40
  6. Step 6: Final answer
    x = 10,845.82

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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.