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Finding the Fourth Proportional to 12,999.59, 19,485.10 and 5,099.72

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Solution

The fourth proportional to 12,999.59, 19,485.10 and 5,099.72 is: 7,643.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.59 : 19,485.10 = 5,099.72 : x
  2. Step 2: Convert to fraction form
    12,999.59/19,485.10 = 5,099.72/x
  3. Step 3: Cross multiply
    12,999.59x = 19,485.10 × 5,099.72
  4. Step 4: Simplify right side
    12,999.59x = 99,368,590.14
  5. Step 5: Solve for x
    x = 99,368,590.14/12,999.59
  6. Step 6: Final answer
    x = 7,643.98

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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.