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Finding the Fourth Proportional to 28,245.58, 42,368.61 and 7,185.64

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Solution

The fourth proportional to 28,245.58, 42,368.61 and 7,185.64 is: 10,778.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,245.58 : 42,368.61 = 7,185.64 : x
  2. Step 2: Convert to fraction form
    28,245.58/42,368.61 = 7,185.64/x
  3. Step 3: Cross multiply
    28,245.58x = 42,368.61 × 7,185.64
  4. Step 4: Simplify right side
    28,245.58x = 304,445,658.67
  5. Step 5: Solve for x
    x = 304,445,658.67/28,245.58
  6. Step 6: Final answer
    x = 10,778.52

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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.