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Finding the Fourth Proportional to 15,991.80, 23,985.60 and 4,899.60

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Solution

The fourth proportional to 15,991.80, 23,985.60 and 4,899.60 is: 7,348.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.80 : 23,985.60 = 4,899.60 : x
  2. Step 2: Convert to fraction form
    15,991.80/23,985.60 = 4,899.60/x
  3. Step 3: Cross multiply
    15,991.80x = 23,985.60 × 4,899.60
  4. Step 4: Simplify right side
    15,991.80x = 117,519,845.76
  5. Step 5: Solve for x
    x = 117,519,845.76/15,991.80
  6. Step 6: Final answer
    x = 7,348.76

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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.