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Finding the Fourth Proportional to 28,460.58, 42,690.87 and 9,740.85

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Solution

The fourth proportional to 28,460.58, 42,690.87 and 9,740.85 is: 14,611.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,460.58 : 42,690.87 = 9,740.85 : x
  2. Step 2: Convert to fraction form
    28,460.58/42,690.87 = 9,740.85/x
  3. Step 3: Cross multiply
    28,460.58x = 42,690.87 × 9,740.85
  4. Step 4: Simplify right side
    28,460.58x = 415,845,361.04
  5. Step 5: Solve for x
    x = 415,845,361.04/28,460.58
  6. Step 6: Final answer
    x = 14,611.28

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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.