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Finding the Fourth Proportional to 19,729, 27,226.02 and 11,345.50

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Solution

The fourth proportional to 19,729, 27,226.02 and 11,345.50 is: 15,656.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,729 : 27,226.02 = 11,345.50 : x
  2. Step 2: Convert to fraction form
    19,729/27,226.02 = 11,345.50/x
  3. Step 3: Cross multiply
    19,729x = 27,226.02 × 11,345.50
  4. Step 4: Simplify right side
    19,729x = 308,892,809.91
  5. Step 5: Solve for x
    x = 308,892,809.91/19,729
  6. Step 6: Final answer
    x = 15,656.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.