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Finding the Fourth Proportional to 19,603.77, 29,405.66 and 7,917.09

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Solution

The fourth proportional to 19,603.77, 29,405.66 and 7,917.09 is: 11,875.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,603.77 : 29,405.66 = 7,917.09 : x
  2. Step 2: Convert to fraction form
    19,603.77/29,405.66 = 7,917.09/x
  3. Step 3: Cross multiply
    19,603.77x = 29,405.66 × 7,917.09
  4. Step 4: Simplify right side
    19,603.77x = 232,807,217.14
  5. Step 5: Solve for x
    x = 232,807,217.14/19,603.77
  6. Step 6: Final answer
    x = 11,875.64

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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.