Home / 21,228.96-29,309.58-13,678.32

Finding the Fourth Proportional to 21,228.96, 29,309.58 and 13,678.32

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Solution

The fourth proportional to 21,228.96, 29,309.58 and 13,678.32 is: 18,884.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,228.96 : 29,309.58 = 13,678.32 : x
  2. Step 2: Convert to fraction form
    21,228.96/29,309.58 = 13,678.32/x
  3. Step 3: Cross multiply
    21,228.96x = 29,309.58 × 13,678.32
  4. Step 4: Simplify right side
    21,228.96x = 400,905,814.31
  5. Step 5: Solve for x
    x = 400,905,814.31/21,228.96
  6. Step 6: Final answer
    x = 18,884.85

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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.