Home / 21,018.98-29,005.31-11,458.67

Finding the Fourth Proportional to 21,018.98, 29,005.31 and 11,458.67

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Solution

The fourth proportional to 21,018.98, 29,005.31 and 11,458.67 is: 15,812.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.98 : 29,005.31 = 11,458.67 : x
  2. Step 2: Convert to fraction form
    21,018.98/29,005.31 = 11,458.67/x
  3. Step 3: Cross multiply
    21,018.98x = 29,005.31 × 11,458.67
  4. Step 4: Simplify right side
    21,018.98x = 332,362,073.22
  5. Step 5: Solve for x
    x = 332,362,073.22/21,018.98
  6. Step 6: Final answer
    x = 15,812.48

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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.