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Finding the Fourth Proportional to 19,917, 29,873.43 and 12,499.47

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Solution

The fourth proportional to 19,917, 29,873.43 and 12,499.47 is: 18,747.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,917 : 29,873.43 = 12,499.47 : x
  2. Step 2: Convert to fraction form
    19,917/29,873.43 = 12,499.47/x
  3. Step 3: Cross multiply
    19,917x = 29,873.43 × 12,499.47
  4. Step 4: Simplify right side
    19,917x = 373,402,042.08
  5. Step 5: Solve for x
    x = 373,402,042.08/19,917
  6. Step 6: Final answer
    x = 18,747.91

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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.