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Finding the Fourth Proportional to 19,893.85, 29,840.78 and 9,357.32

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Solution

The fourth proportional to 19,893.85, 29,840.78 and 9,357.32 is: 14,035.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,893.85 : 29,840.78 = 9,357.32 : x
  2. Step 2: Convert to fraction form
    19,893.85/29,840.78 = 9,357.32/x
  3. Step 3: Cross multiply
    19,893.85x = 29,840.78 × 9,357.32
  4. Step 4: Simplify right side
    19,893.85x = 279,229,727.51
  5. Step 5: Solve for x
    x = 279,229,727.51/19,893.85
  6. Step 6: Final answer
    x = 14,035.98

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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.