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Finding the Fourth Proportional to 14,249.79, 21,374.37 and 7,688.79

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Solution

The fourth proportional to 14,249.79, 21,374.37 and 7,688.79 is: 11,533.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,249.79 : 21,374.37 = 7,688.79 : x
  2. Step 2: Convert to fraction form
    14,249.79/21,374.37 = 7,688.79/x
  3. Step 3: Cross multiply
    14,249.79x = 21,374.37 × 7,688.79
  4. Step 4: Simplify right side
    14,249.79x = 164,343,042.31
  5. Step 5: Solve for x
    x = 164,343,042.31/14,249.79
  6. Step 6: Final answer
    x = 11,533.02

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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.