Home / 21,018.80-29,005.32-11,458.32

Finding the Fourth Proportional to 21,018.80, 29,005.32 and 11,458.32

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Solution

The fourth proportional to 21,018.80, 29,005.32 and 11,458.32 is: 15,812.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.80 : 29,005.32 = 11,458.32 : x
  2. Step 2: Convert to fraction form
    21,018.80/29,005.32 = 11,458.32/x
  3. Step 3: Cross multiply
    21,018.80x = 29,005.32 × 11,458.32
  4. Step 4: Simplify right side
    21,018.80x = 332,352,238.26
  5. Step 5: Solve for x
    x = 332,352,238.26/21,018.80
  6. Step 6: Final answer
    x = 15,812.14

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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.