Home / 21,018.18-29,005.41-11,458.07

Finding the Fourth Proportional to 21,018.18, 29,005.41 and 11,458.07

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Solution

The fourth proportional to 21,018.18, 29,005.41 and 11,458.07 is: 15,812.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.18 : 29,005.41 = 11,458.07 : x
  2. Step 2: Convert to fraction form
    21,018.18/29,005.41 = 11,458.07/x
  3. Step 3: Cross multiply
    21,018.18x = 29,005.41 × 11,458.07
  4. Step 4: Simplify right side
    21,018.18x = 332,346,090.67
  5. Step 5: Solve for x
    x = 332,346,090.67/21,018.18
  6. Step 6: Final answer
    x = 15,812.32

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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.