Home / 21,166.85-29,208.70-11,605.21

Finding the Fourth Proportional to 21,166.85, 29,208.70 and 11,605.21

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Solution

The fourth proportional to 21,166.85, 29,208.70 and 11,605.21 is: 16,014.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.85 : 29,208.70 = 11,605.21 : x
  2. Step 2: Convert to fraction form
    21,166.85/29,208.70 = 11,605.21/x
  3. Step 3: Cross multiply
    21,166.85x = 29,208.70 × 11,605.21
  4. Step 4: Simplify right side
    21,166.85x = 338,973,038.81
  5. Step 5: Solve for x
    x = 338,973,038.81/21,166.85
  6. Step 6: Final answer
    x = 16,014.33

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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.